Table 2.
Risk of HDC by baseline BMI, WC and WtHR
| Variables | No. of cases | No. of person-years | Incidence rate, events per 1,000 person-years | HRs (95% CIs) | ||
|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | ||||
| BMI, kg/m2 | ||||||
| 18.5 | 108 | 7288.2 | 14.82 | 0.67(0.553,0.811) | 0.673(0.556,0.815) | 0.651(0.538,0.788) |
| 18.5–23.9 | 4162 | 183267.8 | 22.71 | 1(ref) | 1(ref) | 1(ref) |
| 24–27.9 | 3884 | 120180.8 | 32.32 | 1.394(1.334,1.457) | 1.387(1.327,1.449) | 1.396(1.336,1.459) |
| ≥ 28 | 1493 | 35766.8 | 41.74 | 1.773(1.671,1.882) | 1.758(1.656,1.866) | 1.769(1.666,1.878) |
| WC(cm) | ||||||
| < 85(females) < 90(males) | 5982 | 247788.5 | 24.14 | 1(ref) | 1(ref) | 1(ref) |
| ≥ 85(females) ≥ 90(males) | 3665 | 98715.0 | 37.13 | 1.515(1.453,1.58) | 1.514(1.452,1.579) | 1.513(1.45,1.578) |
| WtHR | ||||||
| < 0.5 | 3415 | 151946.5 | 22.48 | 1(ref) | 1(ref) | 1(ref) |
| ≥ 0.5 | 6232 | 194557.1 | 32.03 | 1.405(1.347,1.466) | 1.408(1.35,1.469) | 1.412(1.353,1.473) |
Model 1: adjusted for age and gender; Model 2: adjusted for variables in Model 1 plus marital status, smoking, drinking, physical activity and RHR; Model 3: competing-risks survival regression adjusted covariates were the same as Model 2
Abbreviations: OR odd ratio, CI confidential interval, BMI body mass index, WC waist circumference, WtHR waist-to-height ratio, HDC hypertension–diabetes comorbidity