Demographic and disease characteristics.
| Variable | Frequency or Mean (SD) |
|---|---|
| Males | 164 (66.1%) |
| Age at diagnosis of PsA, yrs | 36.0 (12.4) |
| Age at first visit, yrs | 46.7 (12.0) |
| Duration of PsA, yrs | 10.5 (8.5) |
| Mean PASI score | 5.6 (7.4) |
| Mean no. of active joints | 13.3 |
| Mean no. of damaged joints | 9.7 |
PsA: psoriatic arthritis; PASI: Psoriasis Area and Severity Index.