Table 2. Crude and age-adjusted mortality rate according to BMI categories.
| BMI | N | Deaths | Person-years | Crude mortality rate (per 105 person-years) | Age-adjusted mortality rate* (per 105 person-years) |
|---|---|---|---|---|---|
| <15.0 | 210 | 40 | 1721.5 | 2323.6 | 828.5 |
| 15.0–17.4 | 3384 | 297 | 27695.2 | 1072.4 | 459.4 |
| 17.5–19.9 | 37326 | 1885 | 310528.27 | 607.0 | 385.5 |
| 20.0–22.4 | 140462 | 4968 | 1180809.2 | 420.7 | 381.6 |
| 22.5–24.9 | 131610 | 4073 | 1106778.4 | 368.0 | 359.0 |
| 25.0–27.4 | 43693 | 1151 | 363821.6 | 316.4 | 275.5 |
| 27.5–29.9 | 12257 | 332 | 101904.7 | 325.8 | 239.4 |
| 30.0–32.4 | 3082 | 74 | 25589.6 | 289.2 | 212.9 |
| 32.5–34.9 | 588 | 15 | 4901.7 | 306.0 | 276.1 |
| ≥35.0 | 181 | 8 | 1493.6 | 535.6 | 261.7 |
*Age-adjusted mortality was calculated using the 10-year age specific mortality and the age distribution of the Chinese population 2000 year census data.
BMI: Body Mass Index.