Table 1.

Baseline characteristics of primary cohorts

	Rheumatoid arthritis (n = 48,718)	Psoriatic arthritis/Psoriasis (n = 40,346)	Non-rheumatic (n = 442,033)
	N (%) or mean (± SD)
Age, years	58 (± 16)	50 (± 17)	53 (± 17)
Gender, female	32,867 (68%)	20,038 (50%)	262,914 (60%)
Physician visits	10 (± 9)	7 (± 7)	6 (± 7)
Number of medications	4 (± 4)	4 (± 3)	2 (± 3)
Prior use of oral	8,041 (17%)	2,188 (5%)	11,381 (3%)
glucocorticoids
Prior use of systemic immunosuppressives*	6,989 (14%)	1,354 (3%)	917 (0.2%)
Prior use of topical glucocorticoids*	529 (1%)	4,732 (12%)	2,668 (0.6%)
Comorbidity index	0.35 (± 0.70)	0.16 (± 0.52)	0.35 (± 0.78)

^*see text for listing of systemic immunosuppressives and high potency topical glucocorticoids.