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Incidence of PsA
| Psoriasis (all) | Mild psoriasis (BSA < 3%) | Moderate psoriasis (BSA 3–10%) | Severe psoriasis (BSA >10%) | Controls | |
|---|---|---|---|---|---|
| New PsA diagnoses, n | 190 | 73 | 75 | 35 | 29 |
| Time, mean, years | 4.2 | 4.2 | 4.0 | 4.2 | 4.2 |
| Total, n | 8323 | 4310 | 2836 | 899 | 89 598 |
| PYs | 34 915 | 18 164 | 12 041 | 3606 | 374 616 |
| Incidence/1000 PYs | 5.4 | 4.0 | 6.2 | 9.7 | 0.08 |
BSA: body surface area; PYs: person-years.
