Household income (yen/year) | Total (N = 2946) | High (N = 656) | Middle (N = 1696) | Low (N = 594) | p for trend |
Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | ||
Age (year) | 56.9 ± 14.5 | 52.0 ± 12.7 | 56.6 ± 15.0 | 63.3 ± 12.7 | <0.001a |
Men (%) | 43.7% | 40.8% | 46.3% | 39.1% | 0.032b |
Height (cm) | 159.3 ± 9.2 | 160.9 ± 8.8 | 159.8 ± 9.1 | 156.1 ± 8.9 | <0.001a |
Weight (kg) | 59.1 ± 11.6 | 59.3 ± 12.1 | 59.7 ± 11.7 | 57.3 ± 10.8 | <0.001a |
Body mass index (kg/m2) | 23.2 ± 3.5 | 22.7 ± 3.4 | 23.3 ± 3.4 | 23.4 ± 3.5 | <0.001a |
Systolic blood pressure (mmHg) | 132.9 ± 19.9 | 128.0 ± 19.0 | 132.6 ± 19.4 | 139.3 ± 20.3 | <0.001a |
Diastolic blood pressure (mmHg) | 80.3 ± 11.4 | 79.6 ± 11.4 | 80.3 ± 11.3 | 81.1 ± 11.8 | 0.05a |
Random blood glucose (mg/dl) | 104.2 ± 33.8 | 99.6 ± 25.7 | 103.7 ± 33.9 | 110.5 ± 40.2 | <0.001a |
HbA1c (%) | 5.4 ± 0.8 | 5.4 ± 0.7 | 5.4 ± 0.8 | 5.5 ± 0.9 | 0.002a |
Total cholesterol (mg/dl) | 206.0 ± 35.4 | 207.8 ± 34.6 | 205.3 ± 34.5 | 206.2 ± 38.5 | 0.31a |
LDL-cholesterol (mg/dl) | 119.1 ± 31.2 | 119.9 ± 30.7 | 119.1 ± 30.3 | 117.9 ± 34.0 | 0.52a |
HDL-cholesterol (mg/dl) | 62.3 ± 16.1 | 64.3 ± 16.3 | 62.1 ± 15.7 | 60.5 ± 16.8 | <0.001a |
Triglycerides (mg/dl) | 136.5 ± 99.1 | 133.3 ± 96.3 | 132.4 ± 90.0 | 151.8 ± 122.7 | <0.001a |
Household size (person) | 3.0 ± 1.5 | 3.6 ± 1.4 | 3.0 ± 1.5 | 2.3 ± 1.5 | <0.001a |
Population size of municipalities | |||||
<50,000 (%) | 19.5% | 57.9% | 22.6% | 0.002b | |
≥50,000 - <150,000 (%) | 20.3% | 57.8% | 21.9% | ||
≥150,000 (%) | 25.1% | 57.3% | 17.7% |