Patient characteristics of DEPAR cohort (n = 405).
| Characteristics | Values |
|---|---|
| Demographic characteristics | |
| Age, mean (SD) | 50.1 (13.8) |
| Male, n (%) | 200 (49) |
| Duration of complaints, months, median (IQR) | 11.6 (3.9–32) |
| Paid employment, n (%) | 216 (63) |
| CASPAR criteria, n (%) | 328 (81)$ |
| Clinical characteristics | |
| BMI, mean (SD) | 28.1 (5.2) |
| Tender joint count (68), median (IQR) | 3 (1–7) |
| Swollen joint count (66), median (IQR) | 2 (1–4) |
| Disease subtype, n (%) | |
| Monoarthritis | 78 (19) |
| Oligoarthritis | 151 (37) |
| Polyarthritis | 91 (22) |
| Enthesitis | 37 (9) |
| Axial Disease | 9 (2) |
| Dactylitis | 39 (10) |
| Enthesitis at clinical examination | |
| LEI > 0, n (%) | 162 (40) |
| LEI in case of enthesitis, median (IQR) | 2 (1–3) |
| MASES > 0, n (%) | 136 (34) |
| MASES in case of enthesitis, median (IQR) | 2 (1–3) |
| Dactylitis present, n (%) | 51 (13) |
| Psoriasis | |
| PASI > 0, n (%) | 344 (85) |
| PASI in case of psoriasis, median (IQR) | 2.6 (1–4.7) |
| Family history of psoriasis in case of no active psoriasis, n (%) | 36 (60) |
| CBP onset < 45 yrs of age* | 147 (39) |
| Fulfillment of IBP criteria in CBP* | 57 (15) |
↵* Data on CBP in 380 patients.
↵$ Rheumatoid factor status missing in 31 (8%), and 24 (6%) had only history or family history of psoriasis with negative rheumatoid factor. DEPAR: Dutch south-west Early Psoriatic Arthritis cohort; IQR: interquartile range; CASPAR: classification criteria for psoriatic arthritis; BMI: body mass index; LEI: Leeds Enthesitis Index; MASES: Maastricht Ankylosing Spondylitis Enthesitis Index; PASI: Psoriasis Area and Severity Index; CBP: chronic back pain, defined as presence of back pain complaints for more than 3 months at present or in the past 12 months; IBP: inflammatory back pain (criteria: ASAS criteria for IBP); ASAS: Assessment of SpondyloArthritis international Society.