Table 2. Age- and sex-adjusted hazard ratios and multivariablea hazard ratios for cause-specific mortality according to body mass index.
| Body mass index, kg/m2 | <20.0 kg/m2 | 20.0–22.9 kg/m2 (reference) |
23.0–24.9 kg/m2 | ≥25.0 kg/m2 |
| Person-years at risk | 7120 | 20 386 | 12 901 | 14 300 |
| All-cause | ||||
| Total number of deaths | 267 | 527 | 316 | 347 |
| Age- and sex-adjusted HR (95% CI) | 1.29 (1.11–1.49) | 1.00 | 0.98 (0.85–1.12) | 1.02 (0.89–1.17) |
| Multivariable HR (95% CI) | 1.35 (1.16–1.57) | 1.00 | 0.96 (0.83–1.11) | 0.96 (0.83–1.10) |
| Cardiovascular disease | ||||
| Total number of deaths | 77 | 147 | 104 | 117 |
| Age- and sex-adjusted HR (95% CI) | 1.30 (0.99–1.72) | 1.00 | 1.15 (0.90–1.48) | 1.22 (0.96–1.56) |
| Multivariable HR (95% CI) | 1.40 (1.05–1.85) | 1.00 | 1.11 (0.86–1.43) | 1.10 (0.86–1.41) |
| Cancer | ||||
| Total number of deaths | 75 | 148 | 104 | 94 |
| Age- and sex-adjusted HR (95% CI) | 1.33 (1.01–1.76) | 1.00 | 1.14 (0.89–1.47) | 1.00 (0.77–1.30) |
| Multivariable HR (95% CI) | 1.33 (1.01–1.77) | 1.00 | 1.14 (0.89–1.47) | 0.99 (0.76–1.29) |
| Renal disease | ||||
| Total number of deaths | 9 | 14 | 8 | 12 |
| Age- and sex-adjusted HR (95% CI) | 1.64 (0.71–3.80) | 1.00 | 0.93 (0.39–2.22) | 1.29 (0.60–2.80) |
| Multivariable HR (95% CI) | 2.49 (1.03–6.02) | 1.00 | 0.79 (0.32–1.95) | 1.14 (0.51–2.56) |
| Infectious disease | ||||
| Total number of deaths | 30 | 70 | 22 | 26 |
| Age- and sex-adjusted HR (95% CI) | 1.06 (0.69–1.63) | 1.00 | 0.52 (0.32–0.84) | 0.59 (0.38–0.93) |
| Multivariable HR (95% CI) | 1.19 (0.77–1.85) | 1.00 | 0.50 (0.30–0.81) | 0.51 (0.32–0.82) |
CI, confidence interval; HR, hazard ratio.
aAdjusted for age, sex, history of hypertension, drug treatment for diabetes, family history of diabetes, alcohol intake, smoking status, perceived mental stress, walking, sports, sleep duration, and energy intake.