Table 1.

Epidemiological characteristics of patients included in the study. Comparison between psoriatic arthritis, rheumatoid arthritis and diabetes mellitus.

	PsA n = 215	RA n = 215	DM n = 215	PsA versus RA	PsA versus DM
Female sex, n (%)	123 (57.2)	123 (57.2)	123 (57.2)	1.000	1.000
Age, years; mean (SD)	52.6 (12.6)	52.6 (13.7)	52.6 (9.1)	0.928	0.804
Weight, kg; mean (SD)	83.0 (16.4) n = 175	74.5 (16.6) n = 187	82.1 (22.3)	<0.0001	0.125
Height, cm; mean (SD)	171.6 (9.3) n = 175	168.4 (8.8) n = 187	168.3 (9.4)	0.0007	0.0009
BMI, mean (SD)	28.2 (5.4) n = 175	26.2 (5.3) n = 187	29.0 (7.6)	<0.0001	0.839
Disease duration, months; mean (SD)	91.4 (86.2)	89.3 (83.0)	95.1 (74.1)	0.868	0.245

BMI, body mass index; cm, centimetre; DM, diabetes mellitus; kg, kilogram; n, number; PsA, psoriatic arthritis; RA, rheumatoid arthritis.