Maintenance Study Including Re-induction Therapy for Patients Who Did Not Show a Clinical Effect in Study C87037 (NCT00291668)

A Multi-center, Open-label Study to Investigate the Efficacy and Safety of CDP870 in Active Crohn's Disease Patients, Who Showed no Clinical Efficacy in a Remission Induction Study (Study C87037) But Showed Clinical Efficacy After Additional Remission Induction Therapy Was Applied, at Week 26 After Subcutaneous Administration of CDP870 400 mg From Week 8 Until Week 24 at 4-week Intervals

This 26-week extension study evaluates the efficacy and safety of certolizumab pegol administered subcutaneously every 4 weeks (dosed at Weeks 16, 20, 24, 28 and 32) in subjects with active Crohn's disease who had no clinical response at Week 6 to induction therapy in the 6-week double-blind main study, C87037 (NCT00291668), but subsequently showed clinical response at Week 14 to repeated induction therapy (dosed at Weeks 8, 10 and 12) in this extension study.

This study is an open-label extension study which follows on from the 6-week double-blind main study C87037 (NCT00291668). All 'Week' numbers quoted are relative to the start of the double-blind main study. The first visit in this extension study is at Week 8, and the final efficacy assessment in this extension study, 26 weeks later, is at Week 34.

Inclusion Criteria:

• Subjects who gave written informed consent and who did not show clinical efficacy at Week 6 of the double-blind main study (NCT00291668) [reduction in Crohn's Disease Activity Index (CDAI) score of ≥100 points from Week 0, or remission (CDAI ≤150)]

Exclusion Criteria:

• Subjects who experienced aggravation of Crohn's Disease during the double-blind main study (NCT00291668) and required treatment change