Characteristics of the study population at clinic entry. Values are n (%) or mean ± SD, unless otherwise specified.
| Covariate | NUC, n = 318 | HUC, n = 318 | p |
|---|---|---|---|
| Sex | 1 | ||
| Female | 126 (40) | 126 (40) | |
| Male | 192 (60) | 192 (60) | |
| Age | 51.4 ± 13.3 | 53.4 ± 13.7 | 0.059 |
| Median (min, max) | 52 (18.2, 88.2) | 54.2 (17.5, 85.2) | |
| Race | 0.67 | ||
| White | 268 (84) | 262 (82) | |
| Others | 50 (16) | 54 (17) | |
| PsA duration | 8.4 ± 8.6 | 13.9 ± 11.9 | < 0.001 |
| Psoriasis duration | 20 ± 14.5 | 23.7 ± 14.1 | 0.0016 |
| Duration of followup | 3.6 ± 2.9 | 6.1 ± 3.1 | |
| Median | 3.02 | 6.5 | |
| Employment | 0.57 | ||
| Employed | 188 (59) | 196 (62) | |
| None | 130 (41) | 122 (38) | |
| Smoking | 132 (42) | 162 (51) | 0.021 |
| Alcohol intake | 0.61 | ||
| Daily | 27 (9) | 32 (10) | |
| Social | 152 (48) | 140 (44) | |
| Hypertension | 77 (24) | 141 (44) | < 0.001 |
| Angina | 2 (1) | 10 (3) | 0.037 |
| Cardiomyopathy | 1 (0) | 1 (0) | 1 |
| Myocardial infarction | 1 (0) | 4 (1) | 0.37 |
| Congestive heart failure | 0 (0) | 4 (1) | 0.12 |
| High creatinine | 6 (2) | 26 (8) | < 0.001 |
| Kidney stones | 9 (3) | 28 (9) | 0.0019 |
| Diabetes mellitus | 25 (8) | 48 (15) | 0.0042 |
| Swollen joints count | 0.4 ± 1.4 | 0.6 ± 1.9 | 0.21 |
| Tender joints count | 2.8 ± 6.8 | 3 ± 6.3 | 0.76 |
| PASI | 3.3 ± 5.4 | 4.7 ± 7.3 | 0.0062 |
| ESR, > 20 mm/h for men, > 15 mm/h for women | 76 (24) | 130 (41) | < 0.001 |
| CRP, mg/l | 57 ± 29 | 89 ± 49 | < 0.001 |
| Hypercholesterolemia | 54 (17) | 60 (19) | 1 |
| Hypertriglyceridemia | 14 (4) | 13 (4) | 0.7 |
| BMI | 28.5 ± 6.5 | 31.7 ± 5.7 | < 0.001 |
BMI: body mass index; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; HUC: hyperuricemia; NUC: normal uric acid; PASI: Psoriasis Area and Severity Index; PsA: psoriatic arthritis.