Descriptive characteristics at baseline of participants who develop psoriatic arthritis (PsA) or not at the end of the follow-up
| No PsA (n=413) | PsA (n=51) | P value* | |
| Age, years | 46.59±0.58 | 53.73±1.51 | <0.001 |
| Sex, male, n (%) | 210 (45) | 28 (55) | 0.143 |
| BMI, kg/m2 | 26.83±0.13 | 26.45±0.52 | 0.357 |
| Current smoker, n (%) | 125 (27) | 14 (27) | 0.930 |
| Psoriasis duration, years | 22.38±0.40 | 25.33±0.82 | 0.013 |
| Baseline PASI | 12.48±0.27 | 11.14±0.69 | 0.098 |
| Family history of PsA, n (%) | 32 (7) | 7 (14) | 0.046 |
| Body areas affected by psoriasis | |||
| Scalp, n (%) | 306 (66) | 40 (78) | 0.051 |
| Folds, n (%) | 193 (42) | 16 (31) | 0.116 |
| Nails, n (%) | 190 (41) | 28 (55) | 0.032 |
| Comorbidities | |||
| Type 2 diabetes, n (%) | 79 (17) | 7 (14) | 0.506 |
| Dyslipidaemia, n (%) | 207 (45) | 26 (51) | 0.332 |
| Hypertension, n (%) | 195 (42) | 25 (5) | 0.283 |
| Obesity, n (%) | 53 (11) | 9 (18) | 0.340 |
Continuous and categorical variables are presented as means±SD and proportions, respectively.
*Unpaired t-test for quantitative variables; χ2 test for qualitative variables
BMI, body mass index; PASI, Psoriasis Area and Severity Index.;