Table 2.

Multivariate risk factor analysis for cancer incidence in 217 patients with psoriatic arthritis (PsA)

	N (%) or	Hazard ratio
Characteristic	mean (SD)	(95% CI)	P value
Age, per 1 year increase	44.0 (±14,2)	1.08 (1.05, 1.11)	<0.001
Female sex	86 (40%)	2.17 (1.05, 4.48)	0.037
Calendar year of PsA incidence	1994 (± 9)	0.98 (0.94, 1.02)	0.320
Inflammatory joint pain present	190 (88%)	0.85 (0.19, 3.77)	0.829
Enthesitis PsA	74 (34%)	1.10 (0.46, 2.60)	0.830
Spine PsA	17 (8%)	1.35 (0.31, 5.80)	0.687
Family history of psoriasis	52/123 (42%)	0.92 (0.25, 3.40)	0.901
Psoriatic nail dystrophy	88 (41%)	0.52 (0.22, 1.24)	0.142
Negative rheumatoid factor	178/182 (98%)	--	0.991
Dactylitis	102 (47%)	0.66 (0.31, 1.39)	0.270