Psoriatic arthritis classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Chandrakala Yannam, MD [2]
Overview
According to the severity of the disease, psoriatic arthritis may be classified into mild, moderate, and severe form of arthritis.
Classification
- Based on the severity, psoriatic arthritis may be classified into following categories:[1]
- Mild
- Moderate
- Severe
| Organ system involvement | Mild psoriatic arthritis | Moderate psoriatic arthritis | Severe psoriatic arthritis |
|---|---|---|---|
| Peripheral arthritis | <5 joints involvement
No damage can be seen on x-ray No loss of physical function Minimal impact on patient's quality of life |
⩾5 joints involvement
Damage can be visible on x-ray Non-responsive to NSAIDs Moderate impact on patient's quality of life |
⩾5 joints involvement
Severe damage may be seen on x-ray Nonresponsive to NSAIDs, standard DMARDs Severe impact on patient's quality of life |
| Axial joint involvement | Mild pain present
No loss of physical function |
Loss of physical function
Bath Ankylosing Spondylitis Disability Activity Index (BASDAI) >4 |
Failure of response |
| Skin | Body Surface Area ( BSA) <5
Psoriasis area and severity index (PASI) <5 |
Resistant to topical therapy
Dermatology Life Quality Index (DLQI)<10 PASI<10 |
BSA>10, DLQI>10PASI>10 |
| Dactylitis | +/- Pain
Normal activity/ function |
Presence of erosive disease or loss of physical function | Failure of response to NSAIDs and conventional DMARDs |
| Enthesitis | Number of sites involved:1–2
No loss of physical function |
Number of sites involved >2
or Loss of function |
Loss of function
>2 sites involvement and failure of response |
References
- ↑ Ritchlin CT, Kavanaugh A, Gladman DD, Mease PJ, Helliwell P, Boehncke WH, de Vlam K, Fiorentino D, Fitzgerald O, Gottlieb AB, McHugh NJ, Nash P, Qureshi AA, Soriano ER, Taylor WJ (September 2009). "Treatment recommendations for psoriatic arthritis". Ann. Rheum. Dis. 68 (9): 1387–94. doi:10.1136/ard.2008.094946. PMC 2719080. PMID 18952643.