| No of patients in the analysis |
|
655 |
| Mean age at clinic entry (range) |
|
43.5 (15.5 to 87.5) |
| Mean age at onset of psoriasis (range) |
|
28.9 (0 to 84) |
| Mean age at onset of arthritis (range) |
|
35.9 (9 to 86) |
| Mean duration of arthritis (SEM) |
|
7.5 (2.9) |
| Mean duration of psoriasis (SEM) |
|
14.6 (3.5) |
| ⩾40 years old at onset of psoriasis |
|
150 (22.9%) |
| ⩾60 years old at onset of psoriatic arthritis |
|
34 (5.2%) |
| Family history of psoriasis |
|
264 (40.5%) |
| Family history of psoriatic arthritis |
|
65 (10%) |
| Actively inflamed joints |
|
|
| No with no actively inflamed joints |
|
43 (6.6%) |
| No with 1–5 actively inflamed joints |
|
181 (27.6%) |
| No with ⩾5 actively inflamed joints |
|
431 (65.8%) |
| Deformed Joints |
|
|
| No with no deformed joints |
|
402 (61.4%) |
| No with 1–5 deformed joints |
|
138 (21.1%) |
| No with ⩾5 deformed joints |
|
115 (17.5%) |
| Mean No of active joints (SEM) |
|
10.1 (3.1) |
| Mean No of deformed joints (SEM) |
|
3.2 (2.8) |
