Treatment grid for disease components of psoriatic arthritis.
| Mild | Moderate | Severe | |
|---|---|---|---|
| Peripheral arthritis | > 5 joints; no damage on radiograph; no LOF; QOL—minimal impact; patient evaluation mild | ≥ 5 joints (S or T); damage on radiograph; IR to mild treatment; moderate LOF; moderate impact on QOL; patient evaluation moderate | ≥ 5 joints (S or T); severe damage on radiograph; IR to mild-moderate treatment; severe LOF; severe impact on QOL; patient evaluation severe |
| Skin disease | BSA > 5, PASI > 5; asymptomatic | Nonresponse to topicals; DLQI, PASI > 10 | BSA > 10, DLQI > 1, PASI > 10 |
| Enthesitis | 1–2 sites; no LOF | > 2 sites or LOF | LOF or > 2 sites and failure of response |
| Dactylitis | Pain absent to mild; normal function | Erosive disease or functional loss | Failure of response |
BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BSA: body surface area; DLQI: Dermatology Life Quality Index; IR: inadequate response; LOF: loss of physical function; PASI: Psoriasis Area and Severity Index; QOL: quality of life; S: swollen; T: tender.