Table 3.
Incidence of T2DM and Hazard Ratios (95% CI) of Waist Circumference for Different Subgroups in the Cox Proportional-Hazards Model
| Waist Circumference | |||
|---|---|---|---|
| Normal | Increased | Substantially Increased | |
| Men (n=2238) | |||
| No of subjects | 1682 | 365 | 191 |
| No of T2DM cases | 104 | 36 | 22 |
| Person-years | 10,668.8 | 2256.2 | 1154.8 |
| Incidence ratea | 9.7 | 16.0 | 19.1 |
| HR (95% CI) | 1.00 | 1.48 (0.98–2.23) | 1.60 (0.97–2.66) |
| Women (n=2110) | |||
| No of subjects | 1023 | 537 | 550 |
| No of T2DM cases | 66 | 48 | 74 |
| Person-years | 6511.8 | 3401.0 | 3281.4 |
| Incidence ratea | 10.1 | 14.1 | 22.6 |
| HR (95% CI) | 1.00 | 1.29 (0.88–1.90) | 1.96 (1.36–2.85) |
| Prediabetes (n=1901) | |||
| No of subjects | 1149 | 402 | 350 |
| No of T2DM cases | 90 | 53 | 62 |
| Person-years | 7293.5 | 2476.9 | 2069.9 |
| Incidence ratea | 12.3 | 21.4 | 30.0 |
| HR (95% CI) | 1.00 | 1.85 (1.27–2.69) | 2.46 (1.67–3.61) |
| NGT (n=2447) | |||
| No of subjects | 1556 | 500 | 391 |
| No of T2DM cases | 80 | 31 | 34 |
| Person-years | 9887.2 | 3180.3 | 2366.3 |
| Incidence ratea | 8.1 | 9.7 | 14.4 |
| HR (95% CI) | 1.00 | 1.00 (0.64–1.55) | 1.34 (0.85–2.11) |
Notes: a1000 person-year. Model: adjusted for age, sex, body mass index, district, educational level, smoking consumption, drinking status, systolic blood pressure, diastolic blood pressure, total cholesterol, triglycerides, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol and HbA1c.
Abbreviations: HR, hazard ratio; NGT, normal glucose tolerance; T2DM, type 2 diabetes mellitus.