Adverse events

Participants randomized to receive adalimumab 2.4 mg/kg (maximum dose of 160 mg) at Baseline and matching placebo at Week 1, 1.2 mg/kg (maximum dose of 80 mg) at Week 2, followed by 0.6 mg/kg (maximum dose of 40 mg) at Week 4 and Week 6. TEAEs during induction period: events with an onset date on or after first dose date of study drug in induction period and up to 70 days after last dose date of the study drug in induction period and prior to first dose date of study drug in maintenance period. Mean duration of treatment was 52.8 days.

Participants randomized to receive adalimumab 2.4 mg/kg (maximum dose of 160 mg) at Baseline and at Week 1, 1.2 mg/kg (maximum dose of 80 mg) at Week 2, followed by 0.6 mg/kg (maximum dose of 40 mg) at Week 4 and Week 6. TEAEs during induction period: events with an onset date on or after first dose date of study drug in induction period and up to 70 days after last dose date of the study drug in induction period and prior to first dose date of study drug in maintenance period. Mean duration of treatment was 55.4 days.

(After Amendment 4) participants assigned to open-label adalimumab 2.4 mg/kg (maximum dose of 160 mg) at Baseline and at Week 1, 1.2 mg/kg (maximum dose of 80 mg) at Week 2, followed by 0.6 mg/kg (maximum dose of 40 mg) at Week 4 and Week 6. TEAEs during induction period: events with an onset date on or after first dose date of study drug in induction period and up to 70 days after last dose date of the study drug in induction period and prior to first dose date of study drug in maintenance period. Mean duration of treatment was 53.8 days.

Participants demonstrating a clinical response per PMS (defined as a decrease in PMS ≥ 2 points and ≥ 30% from Baseline) at Week 8 randomized to adalimumab maintenance standard dose (0.6 mg/kg \[maximum dose of 40 mg\] eow). Participants were to continue their blinded treatment during the maintenance period until Week 52 unless they had ≥ 2 flares and got open label adalimumab rescue therapy after the second flare. TEAEs during maintenance period: events with an onset date on or after first dose date of study drug in maintenance period and prior to re-randomization due to first disease flare if applicable and up to 70 days after the last dose date of the study drug in maintenance period. Events with an onset date on or after the first dose date in long-term follow-up study M10-870 (NCT02632175) are excluded. Mean duration of treatment was 226.8 days.

Participants demonstrating a clinical response per PMS (defined as a decrease in PMS ≥ 2 points and ≥ 30% from Baseline) at Week 8 randomized to adalimumab maintenance high dose (0.6 mg/kg \[maximum dose of 40 mg\] ew). Participants were to continue their blinded treatment during the maintenance period until Week 52 unless they had ≥ 2 flares and got open label adalimumab rescue therapy after the second flare. TEAEs during maintenance period: events with an onset date on or after first dose date of study drug in maintenance period and prior to re-randomization due to first disease flare if applicable and up to 70 days after the last dose date of the study drug in maintenance period. Events with an onset date on or after the first dose date in long-term follow-up study M10-870 (NCT02632175) are excluded. Mean duration of treatment was 241.0 days.

(Prior to Amendment 4) participants demonstrating a clinical response per PMS (defined as a decrease in PMS ≥ 2 points and ≥ 30% from Baseline) at Week 8 randomized to maintenance placebo. Participants were to continue their blinded treatment during the maintenance period until Week 52 unless they had ≥ 2 flares and got open label adalimumab rescue therapy after the second flare. TEAEs during maintenance period: events with an onset date on or after first dose date of study drug in maintenance period and prior to re-randomization due to first disease flare if applicable and up to 70 days after the last dose date of the study drug in maintenance period. Events with an onset date on or after the first dose date in long-term follow-up study M10-870 (NCT02632175) are excluded. Mean duration of treatment was 184.2 days.

Participants receiving any adalimumab during Induction or Maintenance Phase. Any Adalimumab TEAEs: events with an onset date on or after first dose date of adalimumab and up to 70 days after the last dose date of adalimumab and prior to the first dose date in M10-870 if applicable, whichever comes first. For participants who received placebo during the maintenance period, TEAE collection period ends 70 days after last induction dose of adalimumab and re-starts with their next adalimumab dose, if applicable. Mean duration of treatment was 256.3 days.