Table 3. IR and multivariate-adjusted HR (95% CI) of myocardial infarction and ischemic stroke according to baseline WC (in 11 levels).
| WC levelsa | Total no. | No. of events | IR (per 1,000 person years) | Multivariate-adjusted HR (95% CI) | |
|---|---|---|---|---|---|
| Total | Total (adding BMI as a variable) | ||||
| Myocardial infarction | |||||
| 1 | 195,032 | 658 | 0.639 | 0.906 (0.838–0.980) | 0.887 (0.815–0.965) |
| 2 | 1,068,597 | 2,591 | 0.455 | 0.826 (0.793–0.860) | 0.833 (0.797–0.870) |
| 3 | 2,810,721 | 8,200 | 0.542 | 0.813 (0.793–0.833) | 0.818 (0.796–0.841) |
| 4 | 4,312,095 | 17,489 | 0.746 | 0.871 (0.855–0.887) | 0.875 (0.857–0.893) |
| 5 | 5,032,969 | 28,648 | 1.038 | 0.934 (0.919–0.949) | 0.936 (0.921–0.952) |
| 6 | 4,162,947 | 30,698 | 1.344 | 1 (Ref) | 1 (Ref) |
| 7 | 2,437,161 | 21,413 | 1.607 | 1.040 (1.022–1.058) | 1.038 (1.019–1.057) |
| 8 | 1,101,851 | 11,028 | 1.842 | 1.098 (1.074–1.123) | 1.094 (1.068–1.120) |
| 9 | 418,626 | 4,356 | 1.934 | 1.115 (1.080–1.152) | 1.107 (1.070–1.146) |
| 10 | 140,496 | 1,549 | 2.076 | 1.221 (1.160–1.286) | 1.212 (1.147–1.280) |
| 11 | 68,766 | 659 | 1.836 | 1.215 (1.124–1.313) | 1.184 (1.090–1.286) |
| Ischemic stroke | |||||
| 1 | 195,032 | 926 | 0.899 | 0.882 (0.826–0.942) | 0.852 (0.794–0.914) |
| 2 | 1,068,597 | 3,516 | 0.618 | 0.849 (0.820–0.879) | 0.808 (0.778–0.838) |
| 3 | 2,810,721 | 11,767 | 0.778 | 0.894 (0.875–0.912) | 0.859 (0.839–0.879) |
| 4 | 4,312,095 | 24,947 | 1.065 | 0.929 (0.914–0.944) | 0.904 (0.889–0.920) |
| 5 | 5,032,969 | 40,647 | 1.475 | 0.972 (0.958–0.985) | 0.959 (0.945–0.972) |
| 6 | 4,162,947 | 43,360 | 1.902 | 1 (Ref) | 1 (Ref) |
| 7 | 2,437,161 | 30,652 | 2.305 | 1.026 (1.011–1.042) | 1.040 (1.025–1.056) |
| 8 | 1,101,851 | 16,113 | 2.698 | 1.071 (1.052–1.091) | 1.101 (1.079–1.122) |
| 9 | 418,626 | 6,468 | 2.879 | 1.086 (1.058–1.115) | 1.132 (1.100–1.165) |
| 10 | 140,496 | 2,310 | 3.104 | 1.186 (1.137–1.238) | 1.258 (1.203–1.316) |
| 11 | 68,766 | 931 | 2.599 | 1.139 (1.067–1.216) | 1.234 (1.152–1.322) |
P<0.0001 for all data. Data were adjusted for age, sex, smoking, alcohol drinking, regular physical activity, low-income status, hypertension, diabetes, dyslipidemia, chronic obstructive pulmonary disease, and cancer.
IR, incidence rate; HR, hazard ratio; CI, confidence interval; WC, waist circumference; BMI, body mass index.
aWC levels, in cm: level 1 (male <65, female <60), level 2 (male 65 to 69.9, female 60 to 64.9), level 3 (male 70 to 74.9, female 65 to 69.9), level 4 (male 75 to 79.9, female 70 to 74.9), level 5 (male 80 to 84.9, female 75 to 79.9), level 6 (male 85 to 89.9, female 80 to 84.9), level 7 (male 90 to 94.9, female 85 to 89.9), level 8 (male 95 to 99.9, female 90 to 94.9), level 9 (male 100 to 104.9, female 95 to 99.9), level 10 (male 105 to 109.9, female 100 to 104.9), and level 11 (male ≥110, female ≥105).