Overall characteristics of 431 patients with psoriatic arthritis. Data are median [IQR] or n (%).
| Characteristics | |
|---|---|
| Age, as of December 31, 2013, yrs | 53.00 [43.00, 64.00] |
| Men | 258 (59.9) |
| Age at psoriasis onset, yrs | 37.00 [25.00, 51.00] |
| Age at arthritis onset, yrs | 45.00 [36.00, 57.00] |
| Latency time to onset of arthritis (from psoriasis onset), yrs | 5.00 [0.00, 13.00] |
| Duration of psoriasis, yrs | 13.00 [7.00, 22.00] |
| Duration of psoriatic arthritis, yrs | 5.00 [2.00, 10.00] |
| History of smoking | 163 (37.8) |
| Obesity | 112 (26.0) |
| Family history | 42 (9.7) |
| Arthritis type | |
| Distal interphalangeal | 38 (8.9) |
| Oligoarthritis | 122 (28.6) |
| Polyarthritis | 258 (60.4) |
| Mutilans | 2 (0.5) |
| No peripheral arthritis | 3 (0.7) |
| Skin lesion | |
| Psoriasis vulgaris | 385 (91.9) |
| Guttate psoriasis | 2 (0.5) |
| Pustular psoriasis | 26 (6.2) |
| No skin lesions | 6 (1.4) |
| Nail lesions | 168 (39.0) |
| Dactylitis | 177 (41.1) |
| Enthesitis | 187 (43.4) |
| Axial symptoms | 149 (34.6) |
| Timing of onset | |
| Psoriasis first | 312 (72.9) |
| Simultaneous | 69 (16.1) |
| Arthritis first | 47 (11.0) |
| Imaging findings | |
| Peripheral arthritis (typical new bone formation with or without erosions) | 190/286 (66.4) |
| Axial joints | 164/401 (40.9) |
| Syndesmophytes in radiograph | 165/341 (48.4) |
| Sacroiliac lesions in radiograph | 127/296 (42.9) |
| Spinal lesions using MRI | 54/122 (44.2) |
| Sacroiliac lesions using MRI | 52/151 (34.4) |
| Blood tests | |
| Rheumatoid factor-positive | 49 (11.9) |
| Anticyclic citrullinated peptide antibodies | 23 (6.1) |
| Elevated C-reactive protein | 195 (45.2) |
| Elevated matrix metalloprotease-3 | 108 (30.5) |
| Concomitant diseases | |
| Hyperlipidemia | 189 (43.9) |
| Diabetes | 65 (15.1) |
| Hyperuricemia | 90 (20.9) |
| Hypertension | 100 (23.2) |
| Liver dysfunction | 126 (29.2) |
IQR: interquartile range; MRI: magnetic resonance imaging.