Single factor analysis
| Description | OR | p Value (Z) | |
|---|---|---|---|
| *Likelihood ratio test. | |||
| ESR, erythrocyte sedimentation rate; IAS, intra-articular steroids; DMARD, disease modifying antirheumatic drug; NSAID, non-steroidal anti-inflammatory drug; OR, odds ratio; y, years. | |||
| Age at first clinic visit (y) | 1.00 | 0.64 | |
| Duration of psoriasis at clinic entry (y) | 0.99 | 0.14 | |
| Duration of psoriatic arthritis at clinic entry (years) | 0.98 | 0.035 | |
| Family history of psoriasis (yes/no) | 0.82 | 0.25 | |
| Family history of psoriatic arthritis (yes/no) | 1.30 | 0.39 | |
| ESR at clinic entry (abnormal/normal) | 0.80 | 0.27 | |
| Rheumatoid factor at clinic entry (present/absent) | 1.12 | 0.66 | |
| Drug treatment | |||
| NSAIDs | 1 | 0.66* | |
| DMARDs | 0.90 | ||
| IAS | 0.67 | ||
| None | 0.84 | ||
| Antinuclear antibody (present/absent) | 0.85 | 0.41 | |
| Age at onset of psoriasis (y) | 1.00 | 0.43 | |
| Age at onset of arthritis (y) | 1.01 | 0.34 | |
| History of activity before damage (present/absent) | 0.92 | 0.50 | |
| History of effusion before damage (present/absent) | 1.12 | 0.43 | |
| Recent history of effusion (present/absent) | 1.73 | 0.002 | |
| Current effused joint (yes/no) | 1.24 | 0.16 | |
| Duration of psoriasis at time of damage (y) | 0.99 | 0.03 | |
| Duration of psoriatic arthritis at time of damage (y) | 0.98 | 0.01 | |
| ESR at time of damage (abnormal/normal) | 0.88 | 0.55 | |