Table 1.
Demographic and clinical characteristics of patients
| Total (N = 220) | |
|---|---|
| Demographic, % (n) | |
| Age, mean ± SD | 47.2 ± 14.1 |
| Gender | |
| Female | 32.7% (72) |
| Male | 67.3% (148) |
| Smoking | |
| Non-smoker | 79.0% (173) |
| Smoker | 9.6% (21) |
| Ex-smoker | 11.4% (25) |
| Drinking | |
| Non-drinker | 31.5% (69) |
| Ex-drinker | 10.5% (23) |
| Social drinker | 53.0% (116) |
| Current drinker | 4.6% (10) |
| Education level | |
| Nil | 0.5% (1) |
| Primary | 10.5% (23) |
| Secondary | 47.5% (104) |
| Tertiary or above | 41.6% (91) |
| Family income level | |
| < US$1282 | 18.9% (41) |
| US$1282–3846 | 42.9% (93) |
| US$3846–7692 | 20.7% (45) |
| > US$7692 | 17.5% (38) |
| Occupation | |
| Student | 5.5% (12) |
| Housewife | 7.3% (16) |
| Work | 70.0% (154) |
| Unemployed | 4.1% (9) |
| Retired | 13.2% (29) |
| Clinical, % (n) | |
| Peripheral arthritis | |
| No | 60.5% (133) |
| Yes | 39.5% (87) |
| Dactylitis | |
| No | 96.3% (211) |
| Yes | 3.7% (8) |
| Uveitis | |
| No | 63.9% (140) |
| Yes | 36.1% (79) |
| Psoriasis | |
| No | 85.0% (187) |
| Yes | 15.0% (33) |
| Backpain duration | 16.6 ± 12.1 |
| Psoriasis duration | 16.1 ± 11.9 |
| Any back pain | |
| No | 9.2% (20) |
| Yes | 90.8% (197) |
| Current back pain | |
| No | 23.5% (51) |
| Yes | 76.5% (166) |
| Spinal pain in the past week | 3.95 ± 2.69 |
| No | 10.5% (23) |
| Yes | 89.5% (197) |
| Tender joints | 0.32 ± 1.07 |
| Swollen joints | 0.16 ± 0.94 |
| Dactylitis score | 0.01 ± 0.10 |
| Enthesitis score | 0.20 ± 0.69 |
| CRP | 0.73 ± 1.45 |
| ESR | 24.2 ± 19.2 |
SD standard deviation, US US dollars, CRP C-reactive protein, ESR erythrocyte sedimentation rate