Table 1.
General patient characteristics
| Variable | N | Central descriptor N (%) | Estimation % (95% interval limits) |
|---|---|---|---|
| Gender | |||
| Male | 476 | 476 (94.1%) | 94.1% (91.6–96.0) |
| Female | 30 | 30 (5.9%) | 5.9% (4.0–8.4) |
| Age at first visit | 506 | 59.6 ± 12.3 | 59.6 (58.5–60.7) |
| Age at onset | 506 | 64.4 ± 12.3 | 64.4 (63.3–65.5) |
| Body constitution | 180 | ||
| Normal weight | 31 (17.2%) | 17.2% (12.0–23.5) | |
| Overweight | 58 (32.2%) | 32.2% (25.5–39.6) | |
| Obese | 91 (50.6%) | 50.6% (43.0–58.1) | |
| Renal functiona | 326 | ||
| Normal | 172 (52.8%) | 52.8% (47.2–58.3) | |
| Mild renal functional impairment | 73 (22.4%) | 22.4% (18.0–27.3) | |
| Moderate renal functional impairment | 63 (19.3%) | 19.3% (15.2–24.0) | |
| Severe renal functional impairment | 18 (5.5%) | 5.5% (3.3–8.6) | |
| Hyperlipidemia | 387 | ||
| Not present | 175 (45.2%) | 45.2% (40.2–50.3) | |
| Present | 212 (54.8%) | 54.8% (49.7–59.8) | |
| Hypertension | 337 | ||
| Not present | 211 (62.6%) | 62.6% (57.2–67.8) | |
| Hypertension | 126 (37.4%) | 37.4% (32.2–42.8) | |
| Hyperglycemia | 292 | ||
| Not present | 218 (74.7%) | 74.7% (69.3–79.5) | |
| Present | 74 (25.3%) | 25.3% (20.5–30.7) | |
| Ethanol intake | 288 | ||
| Not at all | 59 (20.5%) | 20.5% (16.0–25.6) | |
| Occasional drinker | 90 (31.3%) | 31.3% (25.9–36.9) | |
| Moderate drinker | 108 (37.5%) | 37.5% (31.9–43.4) | |
| Heavy drinker | 31 (10.8%) | 10.8% (7.4–14.9) | |
| Renal lithiasis history | 504 | 116 (23.0%) | 23.0% (19.4–26.9) |
| Concomitant drugs inducing hyperuricemia | 206 | 178 (86.4%) | 86.4% (81.0–90.8) |
| Joint involvement | 506 | ||
| Mono-articular (1 joint ever involved) | 153 (30.2%) | 30.2% (26.3–34.4) | |
| Oligo-articular (2–4 joints ever involved) | 220 (43.5%) | 43.5% (39.1–47.9) | |
| Poly-articular (> 4 joints ever involved) | 131 (25.9%) | 25.9% (22.1–29.9) | |
| Information on tophi (positive or negative) | 499 | ||
| Tophaceous gout | |||
| Single tophus | 104 (20.8%) | 20.8% (17.4–24.7) | |
| Multiple tophi | 67 (13.4%) | 13.4% (10.6–16.7) | |
| Non-tophaceous gout | 328 (65.7%) | 65.7% (61.4–69.9) | |
aNormal, glomerular filtration rate (GFR) ≥ 90 ml/min; mild renal functional impairment, 60 ml/min ≤ GFR < 90 ml/min; moderate renal functional impairment, 30 ml/min ≤ GFR < 60 ml/min; severe renal functional impairment, GFR ≤ 30 ml/min