The prevalence (95% CI) of psoriatic arthritis (per 1000 inhabitant's age ≥20 years) stratified for gender and age groups
| Age, years | Men (95% CI) | Women (95% CI) |
|---|---|---|
| 20–39 | 3.5 (1.8 to 5.3) | 3.2 (1.7 to 4.6) |
| 40–59 | 8.1 (6.3 to 9.9) | 10.0 (8.2 to 11.9) |
| >60 | 5.5 (4.0 to 7.0) | 5.9 (4.4 to 7.3) |
| Total | 6.7 (5.2 to 7.3) | 7.0 (6.0 to 8.0) |