Table 1 Baseline characteristics
Quartiles of Hb | p value | |||||
|---|---|---|---|---|---|---|
Total (n = 2,560) | I (lowest) (≤ 12.8 g/dL) (n = 647) | II (12.9–13.6 g/dL) (n = 725) | III (13.7–14.5 g/dL) (n = 585) | IV (highest) (≥ 14.6 g/dL) (n = 603) | ||
Age (years) | 60.4 ± 7.9 | 60.8 ± 7.8 | 60.3 ± 7.3 | 60.9 ± 7.7 | 59.7 ± 8.7 | 0.029 |
Male sex, n (%) | 842 (32.9) | 56 (8.7) | 82 (11.3) | 193 (33.0) | 511 (84.7) | < 0.001 |
BMI (kg/m2) | 24.9 ± 3.0 | 24.3 ± 3.0 | 24.7 ± 2.9 | 25.1 ± 3.0 | 25.4 ± 2.9 | < 0.001 |
Waist circumference (cm) | 83.8 ± 8.5 | 80.9 ± 8.3 | 82.4 ± 8.3 | 84.4 ± 8.3 | 87.9 ± 7.5 | < 0.001 |
Systolic BP (mmHg) | 122.8 ± 15.1 | 119.2 ± 15.4 | 121.3 ± 14.7 | 124.0 ± 14.7 | 127.2 ± 14.5 | < 0.001 |
Diastolic BP (mmHg) | 73.9 ± 9.8 | 70.4 ± 9.7 | 72.2 ± 9.3 | 75.0 ± 8.9 | 78.7 ± 9.3 | < 0.001 |
Hypertension, n (%) | 1,273 (49.7) | 297 (45.9) | 341 (47.0) | 299 (51.1) | 336 (55.7) | 0.002 |
Diabetes mellitus, n (%) | 411 (16.1) | 93 (14.4) | 88 (12.1) | 100 (17.1) | 130 (21.6) | < 0.001 |
Hyperlipidemia, n (%) | 938 (36.6) | 268 (41.4) | 275 (37.9) | 212 (36.2) | 183 (30.3) | 0.001 |
Smoking, n (%) | 695 (27.1) | 51 (7.9) | 85 (11.7) | 170 (29.1) | 389 (64.5) | < 0.001 |
Total cholesterol (mg/dL) | 199.3 ± 36.2 | 198.2 ± 36.0 | 201.0 ± 37.2 | 199.9 ± 35.6 | 197.9 ± 35.9 | 0.364 |
Triglycerides (mg/dL) | 129.0 ± 70.6 | 116.2 ± 61.9 | 120.5 ± 59.7 | 130.2 ± 66.8 | 151.9 ± 87.5 | < 0.001 |
HDL-C (mg/dL) | 54.4 ± 14.8 | 58.2 ± 14.9 | 55.8 ± 14.4 | 53.7 ± 14.5 | 49.2 ± 13.6 | < 0.001 |
LDL-C (mg/dL) | 121.6 ± 32.9 | 119.5 ± 32.6 | 123.2 ± 33.5 | 122.2 ± 32.5 | 121.3 ± 32.9 | 0.208 |
Fasting glucose (mg/dL) | 101.3 ± 20.6 | 96.8 ± 15.1 | 98.5 ± 18.0 | 102.7 ± 21.3 | 108.1 ± 25.8 | < 0.001 |
Creatinine (mg/dL) | 0.79 ± 0.19 | 0.74 ± 0.20 | 0.73 ± 0.14 | 0.79 ± 0.18 | 0.91 ± 0.17 | < 0.001 |