Table 1.

Multivariate logistic regression analysis results^a

Outcome	Variable	OR (95% CI)

Clinically important or major improvement of ASDAS CRP	Body Fat % at baseline	0.8 (0.7–0.98)
	Fat Mass Index at baseline	0.7 (0.4–0.99)
	FMI percentile^b at baseline	0.9 (0.9–0.99)
BASDAI MCII^c	FMI percentile^b at baseline	0.95 (0.91–0.99)

^aControlled for gender, age, years with symptoms, days of follow up, use of DMARDs and NSAIDs and baseline outcome value. ^bPercentiles according to the reference population tables, stratified by age and gender. ^cOnly for patients with a BASDAI ≥4 at baseline. CRP = C-reactive protein, ASDAS = Ankylosing Spondylitis Disease Activity Score, BASDAI = Bath Ankylosing Spondylitis Disease Activity Index, MCII = minimum clinically important improvement, FMI = Fat Mass Index.