Table 1.

Characteristics of patients in the study

Demographic and clinical variables	Patients with PsA
N of patients	159
Sex
Male, n (%)	62 (39)
Female, n (%)	97 (61)
Proportion with arthritis, n (%)	147 (92.5)
Oligoarthritis, n (%)	59 (40.1)
Polyarthritis, n (%)	88 (59.9)
DIP joint involvement, n (%)	29 (18.2)
Proportion with enthesitis, n (%)	69 (43.4)
Proportion with spondylitis, n (%)	11 (6.9)

Abbreviations: PsA, psoriatic arthritis; DIP, distal interphalangeal.