Table 1.
Population Characteristics, According to Quartiles of Baseline Plasma Urate Concentration, of Participants in the Atherosclerosis Risk in Communities Study, 1987–1989ab
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | |
| Plasma urate at visit 1, mg/dL | 4.14 (0.57) | 5.36 (0.28) | 6.39 (0.31) | 8.08 (1.02) |
| Plasma urate at visit 2, mg/dL | 4.87 (0.96) | 5.96 (0.92) | 6.88 (1.03) | 8.11 (1.45) |
| Age, years | 53.1 (5.7) | 54.1 (5.7) | 54.5 (5.6) | 54.9 (5.8) |
| Men | 14.2 | 35.3 | 57.7 | 69.4 |
| African American | 21.2 | 24.9 | 25.6 | 31.8 |
| Former smoker | 22.6 | 28.2 | 35.4 | 42.2 |
| Current smoker | 27.8 | 27.7 | 25.4 | 23.4 |
| Caffeine intake, mg/day | 291 (301) | 296 (303) | 293 (293) | 270 (280) |
| Body mass index, kg/m2 | 25.2 (4.4) | 27.1 (5.0) | 28.4 (5.4) | 29.7 (5.4) |
| Total alcohol consumption, g/week | 25.3 (65.6) | 32.7 (72.1) | 47.5 (100.1) | 63.1 (125.0) |
| Plasma creatinine, mg/dL | 0.99 (0.22) | 1.06 (0.21) | 1.13 (0.33) | 1.24 (0.65) |
a
Means (standard deviations) are provided for continuous variables and percentages for categorical variables.
b
All variables were statistically different across urate quartiles (P < 0.001). One-way analysis of variance was conducted for continuous variables and chi-square statistics for categorical variables.