Statistical considerations for stopping systemic lupus erythematosus clinical trials earlier

Table 1 Approximate extreme values of some ordinal outcome scales for systemic lupus erythematosus

Scale^a	Minimum and maximum	Description
SLAM	0 to 84	Systemic Lupus Activity Measure
SLEDAI	0 to 108	Systemic Lupus Erythematosus Disease Activity Index
BILAG	0 to 180	British Isles Lupus Assessment Group
ECLAM	0 to 15.5	European Consensus Lupus Activity Measure

^aListing of items for each scale, and minimum and maximum scores obtained from Lam and Petri [1]

ISSN: 1478-6362