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Efficacy measures from baseline to week 28: BASDAI (A), BASFI (B), and ASDAS (C). p Values are from analysis of treatment group differences in change from baseline at each visit. ASDAS, Ankylosing Spondylitis Disease Activity Score; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; IFX, infliximab; NPX, naproxen; PBO, placebo; VAS, visual analogue scale.
