Demographic features in patients with psoriatic arthritis versus psoriasis without arthritis.
| Feature | Psoriatic Arthritis | Psoriasis |
|---|---|---|
| No. patients | 1747 | 653 |
| Mean age, yrs | 46.0 | 46.3 |
| Disease duration since diagnosis, yrs | ||
| Psoriasis | 15.6 | 16.3 |
| Psoriatic arthritis | 7.3 | NA |
| Average body mass index, % | 31.4 | 28.8 |
| Normal, % (range 18.5–24.9) | 21.5 | 28.8 |
| Overweight, % (range 25.0–29.9) | 36.5 | 36.7 |
| Obese (> 30) | 40.6% | 32.8% |
| Average waist circumference, cm | ||
| Female | 98.9 | 89.4 |
| Male | 98.6 | 96.6 |