Atacicept Phase 2/3 in Generalized Systemic Lupus Erythematosus (APRIL-SLE)

A flare was defined as having an adjudicated BILAG A or B score in any of the 8 organ systems during treatment, or imputed for participants who had premature treatment discontinuation. Discontinuations due to sponsor termination of the atacicept 150 mg group were not imputed as flares in this analysis. The BILAG disease activity index evaluates systemic lupus erythematosus (SLE) activity in 8 organ systems, using a separate alphabetic score (A to E) assigned to each organ system defined as follows. BILAG A: Disease sufficiently active requiring disease-modifying treatment (prednisone greater than 20 mg daily or immunosuppressants); BILAG B: Disease less active than in "A", mild reversible problems requiring only symptomatic therapy such as antimalarials, non-steroidal anti-inflammatory drugs (NSAIDs), or prednisone less than 20 mg day; BILAG C: Stable mild disease; BILAG D: System previously affected but now inactive; BILAG E: System never involved.

A flare was defined as having an adjudicated BILAG A or B score in any of the 8 organ systems during treatment. Analysis was right-censored at Week 52. The hazard ratios and 95% confidence intervals were obtained from the Cox proportional hazards model. The 25th Percentile of time to new flare was reported using Kaplan-Meier estimates (Median was not reached). The BILAG disease activity index evaluates SLE activity in 8 organ systems, using a separate alphabetic score (A to E) assigned to each organ system defined as follows. BILAG A: Disease sufficiently active requiring disease-modifying treatment (prednisone greater than 20 mg daily or immunosuppressants); BILAG B: Disease less active than in "A", mild reversible problems requiring only symptomatic therapy such as antimalarials, NSAIDs, or prednisone less than 20 mg day; BILAG C: Stable mild disease; BILAG D: System previously affected but now inactive; BILAG E: System never involved.

A flare was defined as having an adjudicated BILAG A or B score in any of the 8 organ systems during treatment, or imputed for participants who had premature treatment discontinuation. The BILAG disease activity index evaluates SLE activity in 8 organ systems, using a separate alphabetic score (A to E) assigned to each organ system defined as follows. BILAG A: Disease sufficiently active requiring disease-modifying treatment (prednisone greater than 20 mg daily or immunosuppressants); BILAG B: Disease less active than in "A", mild reversible problems requiring only symptomatic therapy such as antimalarials, NSAIDs, or prednisone less than 20 mg day; BILAG C: Stable mild disease; BILAG D: System previously affected but now inactive; BILAG E: System never involved.

Ordinal response categories have been defined as: 1) No BILAG A, no BILAG B, and completed treatment, 2) No BILAG A, at least 1 BILAG B during treatment period, and 3) At least 1 BILAG A during treatment period. The BILAG disease activity index evaluates SLE activity in 8 organ systems, using a separate alphabetic score (A to E) assigned to each organ system defined as follows. BILAG A: Disease sufficiently active requiring disease-modifying treatment (prednisone greater than 20 mg daily or immunosuppressants); BILAG B: Disease less active than in "A", mild reversible problems requiring only symptomatic therapy such as antimalarials, NSAIDs, or prednisone less than 20 mg day; BILAG C: Stable mild disease; BILAG D: System previously affected but now inactive; BILAG E: System never involved.