Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

This analysis set included all participants who were treated with ocrelizumab (OCR).

Placebo - MMF group included participants whose SOC treatment included MMF as an immunosuppressant treatment.

Placebo-EL group included participants whose SOC treatment included Cyclophosphamide (Euro-lupus) as part of the immunosuppressant treatment.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

This analysis set included all participants who were treated with ocrelizumab (OCR).

Placebo - MMF group included participants whose SOC treatment included MMF as an immunosuppressant treatment.

Placebo-EL group included participants whose SOC treatment included Cyclophosphamide (Euro-lupus) as part of the immunosuppressant treatment.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

This analysis set included all participants who were treated with ocrelizumab (OCR).

Placebo - MMF group included participants whose SOC treatment included MMF as an immunosuppressant treatment.

Placebo-EL group included participants whose SOC treatment included Cyclophosphamide (Euro-lupus) as part of the immunosuppressant treatment.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

This analysis set included all participants who were treated with ocrelizumab (OCR).

Placebo - MMF group included participants whose SOC treatment included MMF as an immunosuppressant treatment.

Placebo-EL group included participants whose SOC treatment included Cyclophosphamide (Euro-lupus) as part of the immunosuppressant treatment.

Participants received 400 mg ocrelizumab IV on Days 1 and 15, followed by 400 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received 1000 mg ocrelizumab IV on Days 1 and 15, followed by 1000 mg ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or MMF 1 g/day in the first week increased to 3 g/day. Participants also received methylprednisolone 100 mg infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of ocrelizumab. Participants also received oral prednisone at starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.

Participants received placebo matched to ocrelizumab infusion intravenously (IV) on Days 1 and 15, followed by placebo matched to ocrelizumab infusion IV on Week 16 and then every 16 weeks up to 48 weeks along with one of the two standard-of-care (SOC) immunosuppressant regimens at the discretion of the investigator. The SOC regimens were: Euro-Lupus (cyclophosphamide 500 mg every 2 weeks for 6 doses followed by azathioprine maintenance at 1-2 milligrams per kilogram per day [mg/kg/day]), or mycophenolate mofetil (MMF) 1 grams per day (g/day) in the first week increased to 3 g/day. Participants also received methylprednisolone 100 milligram (mg) infusion IV or according to local guidelines, completed at least 30 minutes prior to each infusion of placebo. Participants also received oral prednisone at a starting dose of 0.75 mg/kg/day with a maximum dose of 60 mg/day from Day 2. Beginning on Day 16 the doses were tapered and continued for 10 weeks to a target dose of 10 mg/day.