Table 1

Baseline characteristics of patients by specific diseases

	Rheumatoid arthritis	Psoriatic arthritis	Ankylosing spondylitis	Juvenile idiopathic arthritis	Psoriasis	Crohn’s disease
N	12 345	837	1641	171	1819	2228
Mean age, years	53.8	48.4	43.2	11.8	44.1	38.3
Mean disease duration, years	10.6*	14.6*	11.1*	3.8	18.5	11.7*
Female, %	79.1	47.4	27.7	78.9	32.3	61.3
Median duration of exposure, years (range)	0.70 (0.04–9.03)	0.39 (0.04–3.53)	0.38 (0.04–3.04)	2.99 (0.04–4.50)	1.36 (0.04–4.01)	0.50 (0.04–4.42)
On concomitant immunosuppressants, %	61.8	55.6	17.8	49.7	0.3	40.2
On concomitant systemic steroids, %	58.6	19.1	15.4	21.6	1.2	35.3
From US sites, %	21.4	25.3	8.8	51.5	53.3	57.3

*Based on the following number of patients with available baseline disease duration information: rheumatoid arthritis, 11 984; psoriatic arthritis, 819; ankylosing spondylitis, 1640; Crohn’s disease, 1933.