Modified Intent-to-Treat population: all randomized participants who received at least (>=)1 dose, had baseline and >=1 post-baseline assessment of any efficacy variable, irrespective of compliance. Number of participants analyzed = participants with baseline and Week 6 HbA1c assessment. Missing data imputed using last observation carried forward.

Nocturnal hypoglycemia was hypoglycemia that occurred between 00:00 and 05:59 hours (clock time), regardless the participant was awake or woke up because of the event. Severe hypoglycemia was an event that required assistance of another person to actively administer carbohydrate, glucagon, or other resuscitative actions. Confirmed hypoglycemia was an event associated with plasma glucose less than or equal to (<=) 3.9 millimoles per liter (mmol/L) (70 milligram per deciliter [mg/dL]).

Modified intent-to-treat population.

Pre-injection SMPG was measured within 30 minutes prior to the injection of the study drug. Average was assessed by the mean of at least 3 SMPG calculated over the 7 days preceding the assessment visit.

mITT population. Missing data imputed using last observation carried forward. Number of participants analyzed = participants with baseline and Month 6 pre-injection SMPG assessment.

Pre-injection SMPG was measured within 30 minutes prior to the injection of the study drug. Variability was assessed by the mean of coefficient of variation calculated as 100 multiplied by (standard deviation/mean) over at least 3 SMPG measured during the 7 days preceding the assessment visit.

mITT population. Missing data imputed using last observation carried forward. Number of participants analyzed = participants with baseline and Month 6 pre-injection SMPG assessment.

mITT Population. Number of participants analyzed = participants with baseline and Month 6 HbA1c assessment. Missing data imputed using last observation carried forward.

mITT Population. Number of participants analyzed = participants with baseline and Month 6 FPG assessment. Missing data imputed using last observation carried forward.

mITT Population. Number of participants analyzed = participants with Month 6 FPG assessment. Missing data imputed using last observation carried forward.

Change in each time-point of 8-point SMPG profile: 03:00 hours (clock time) at night; before and 2 hours after breakfast; before and 2 hours after lunch; before and 2 hours after dinner; and at bedtime.

mITT Population. Here, n = participants with Baseline and Month 6 8-point SMPG assessment separately for each analysed time point. Missing data imputed using last observation carried forward.

mITT Population. Number of participants analyzed = participants with Baseline and Month 6 basal insulin dose assessment. Missing data imputed using last observation carried forward.

DTSQ is a validated measure to assess how satisfied participants with diabetes are with their treatment and how they perceive hyper- and hypoglycemia. It consists of 8 questions which are answered on a Likert scale from 0 to 6. DTSQ treatment satisfaction score is the sum of question 1 and 4-8 scores and ranges between 0 and 36, where higher scores indicate more treatment satisfaction.

mITT Population. Number of participants analyzed = participants with Baseline and Month 6 DTSQ assessment. Missing data imputed using last observation carried forward.

Hypoglycemia events were Severe hypoglycemia (an event that required assistance of another person to actively administer carbohydrate, glucagon, or other resuscitative actions); Documented symptomatic hypoglycemia (typical symptoms of hypoglycemia with plasma glucose level of <=3.9 mmol/L [70 mg/dL]); Asymptomatic hypoglycemia (no typical symptoms of hypoglycemia but plasma glucose level <=3.9 mmol/L); Probable symptomatic hypoglycemia (an event during which symptoms of hypoglycemia were not accompanied by a plasma glucose determination, but was presumably caused by a plasma glucose level <=3.9 mmol/L, symptoms treated with oral carbohydrate without a test of plasma glucose); Relative hypoglycemia (an event during which the person with diabetes reported any of the typical symptoms of hypoglycemia, and interpreted the symptoms as indicative of hypoglycemia, but plasma glucose level >3.9 mmol/L); Severe and/or confirmed a hypoglycemia (plasma glucose <=3.9 mmol/L).

Safety population: all participants randomized and exposed to at least one dose of study drug, regardless of the amount of treatment administered. In the event of participants having received treatments different from those assigned according to the randomization schedule, safety analyses were conducted according to treatment received.

Substudy comparing fixed dosing regimen (every 24 hours) vs. adaptive dosing regimen (every 24 +/- 3 hours) in a subset of participants randomized to HOE901-U300 and treated for 6 months.

mITT substudy population. Number of participants analyzed = participants with Month 6 and Month 9 HbA1c assessment. Analysis was planned to be performed for participants enrolled in the substudy and who were receiving HOE901-U300 (Adaptable dosing intervals or Fixed dosing intervals).