TABLE 2.
Baseline characteristics of study participants included in the main analysis, in total and by UA quartilesa.
| Characteristics | Total (N = 3103) | Q1 (N = 773) | Q2 (N = 777) | Q3 (N = 776) | Q4 (N = 777) | P Value |
| Age, mean ± SD, years | 85.1 ± 11.7 | 82.8 ± 12.2 | 84.8 ± 11.6 | 85.8 ± 11.4 | 86.8 ± 11.2 | < 0.001 |
| Sex, women (%) | 1,688 (54.4) | 422 (54.6) | 421 (54.2) | 424 (54.6) | 421 (54.2) | 0.996 |
| More than 1 year of education, yes (%) | 1,098 (36.3) | 274 (36.2) | 258 (33.9) | 276 (36.6) | 290 (38.6) | 0.319 |
| Currently married, yes (%) | 1,170 (38.5) | 318 (41.6) | 294 (38.6) | 292 (38.4) | 266 (35.5) | 0.113 |
| Regular exercise, yes (%) | 552 (18.4) | 105 (13.9) | 150 (19.7) | 144 (19.0) | 153 (20.8) | 0.003 |
| Current smoking, yes (%) | 573 (18.8) | 152 (19.9) | 134 (17.4) | 142 (18.5) | 145 (19.3) | 0.628 |
| Current alcohol drinking, yes (%) | 510 (16.8) | 135 (17.6) | 101 (13.3) | 139 (18.2) | 135 (18.0) | 0.028 |
| BMI, mean ± SD, kg/m2 | 21.5 ± 10.1 | 20.8 ± 3.4 | 21.9 ± 17.2 | 21.4 ± 6.3 | 21.8 ± 7.7 | 0.170 |
| Central obesity b, yes (%) | 1,303 (42.3) | 308 (40.1) | 315 (41.0) | 318 (41.3) | 362 (46.8) | 0.031 |
| Adequate medical service, yes (%) | 2,864 (93.9) | 706 (92.4) | 722 (94.1) | 728 (94.9) | 708 (94.1) | 0.212 |
| Hypertension, yes (%) | 1,730 (55.8) | 352 (45.6) | 410 (52.9) | 473 (61.0) | 495 (63.8) | < 0.001 |
| Diabetes mellitus, yes (%) | 331 (10.7) | 74 (9.6) | 65 (8.4) | 99 (12.8) | 93 (12.0) | 0.017 |
| Heart Disease, yes (%) | 232 (7.7) | 58 (7.7) | 46 (6.1) | 61 (8.1) | 67 (8.9) | 0.212 |
| Stroke/CVD, yes (%) | 165 (5.4) | 50 (6.6) | 35 (4.6) | 35 (4.6) | 45 (5.9) | 0.232 |
UA, uric acid; SD, standard deviation; BMI, body mass index; CVD, cardiovascular disease.
Values are given as No. (%) unless otherwise stated.
aThe cutoff values were 213.9, 265.0, and 320.9 μmol/L for women, and 252.0, 305.6, and 365.1 μmol/L for men.
bCentral obesity was defined as waist circumference ≥ 80 cm in women and waist circumference ≥ 85 cm in men.