Table 1 Characteristics of the male participants grouped according to serum uric acid levels
| Â | Serum uric acid quartile | P for trend | |||
|---|---|---|---|---|---|
1st (low) | 2nd | 3rd | 4th (high) | ||
Men (n = 321) | |||||
 Number of participants | 78 | 84 | 78 | 81 |  |
 Serum uric acid (mg/dL) | ≤5.0 | 5.1–5.9 | 6.0–6.6 | ≥6.7 |  |
 eGFR (mL/min/1. 73m2), mean (SD) | 88.7 (13.9) | 88.3 (13.7) | 84.4 (13.0) | 82.5 (13.6) | 0.001 |
 Age (years), mean (SD) | 62.7 (7.9) | 60.2 (9.1) | 59.9 (9.0) | 60.3 (9.4) | 0.103 |
 BMI (kg/m2), mean (SD) | 21.7 (2.4) | 22.4 (2.4) | 22.8 (2.5) | 24.0 (2.7) | <  0.001 |
 SBP (mmHg), mean (SD) | 120 (18) | 121 (17) | 123 (16) | 127 (17) | 0.007 |
 DBP (mmHg), mean (SD) | 75 (9) | 76 (10) | 79 (10) | 81 (11) | <  0.001 |
 HbA1c (%), mean (SD) | 5.5 (0.5) | 5.7 (0.8) | 5.5 (0.5) | 5.5 (0.4) | 0.273 |
 HDL-C (mg/dL), mean (SD) | 63 (14) | 61 (14) | 60 (15) | 60 (14) | 0.137 |
 LDL-C (mg/dL), mean (SD) | 118 (28) | 125 (27) | 131 (26) | 122 (25) | 0.180 |
 TG (mg/dL), median (IQR) | 68 (49, 92) | 78 (58,107) | 98 (64, 120) | 107 (74, 157) | <  0.001 |
 Current smoker, n (%) | 8 (10) | 14 (17) | 5 (6) | 6 (7) | 0.201 |
 Current alcohol drinker, n (%) | 53 (68) | 61 (73) | 62 (79) | 71 (88) | 0.002 |
 Current alcohol intake, ethanol (g/day)a, median (IQR) | 20 (6, 20) | 14 (10, 36) | 20 (9, 42) | 23 (12, 49) | 0.144 |
 Estimated salt intake, g/day (SD) | 8.9 (1.9) | 9.0 (1.9) | 8.7 (2.0) | 9.0 (1.9) | 0.987 |