Table 1 Demographic and clinical characteristics of non-lithiasic and lithiasic gout patients
Variable | Total (N=84) | Non-lithiasic (n=48) | Lithiasic (n=36) | p |
|---|---|---|---|---|
Age, years ,mean | 49.4±17.3 | 50.2 ± 2.8 | 48.4 ± 2.4 | 0.6398 |
Male sex, n(%) | 76 (90.5%) | 40 (83.3%) | 36 (100%) | 0.0093* |
BMI, kg/m2, mean | 26.2±3.6 | 26.7 ± 0.6 | 25.7 ± 0.5 | 0.2138 |
Disease duration | 5.0±3.4 | 4.3 ± 0.5 | 6.0 ± 0.6 | 0.0249* |
The frequency of gout flare, n(%) | Â | Â | Â | 0.0435* |
 Less than 3 times per year | 22 (26.2%) | 17 (35.4%) | 5 (13.9%) |  |
 ≥3 times per year | 62 (73.8%) | 31 (64.6%) | 31 (86.1%) | |
Tophus, n(%) | 26 (31.0%) | 11 (22.9%) | 15(41.7%) | 0.0948 |
Number of involved joints,n(%) | Â | Â | Â | 0.0629 |
 Only one joint | 8 (9.5%) | 6 (5.9%) | 2 (5.5%) |  |
 2-4 joints | 29 (34.5%) | 18 (37.5%) | 11 (30.6%) | |
 Polyarthritis (≥5 joints) | 47 (55.9%) | 24 (50.0%) | 23 (63.9%) | |
Serum urate (umol/L) | 533.6±156.3 | 551.3 ± 24.8 | 510.0 ± 22.0 | 0.2327 |
AP uric acid | 65 (77.4%) | 37 (77.1%) | 28 (77.8%) | 0.9400 |