Table 1. All-cause mortality according to pre-baseline BMI, body weight changes and body weight control questions.
| Pre-baseline BMI groupa | Characteristic | Crude HR (95% CI) | Adjustedb HR (95% CI) |
|---|---|---|---|
| < 25 kg/m2 | Pre-baseline BMI | 0.95 (0.93, 0.98) | 0.97 (0.94, 1.00) |
| Weight change groupc | |||
| Loss | 1.29 (1.15, 1.46) | 1.24 (1.10, 1.41) | |
| Stable | 1.00 | 1.00 | |
| Gain | 0.94 (0.83, 1.07) | 0.96 (0.85, 1.09) | |
| Body weight control questionsd | |||
| ‘Care? Yes | 0.79 (0.71, 0.87) | 0.97 (0.86, 1.08) | |
| No | 1.00 | 1.00 | |
| ‘Good?’ Yes | 1.02 (0.86, 1.21) | 1.24 (1.03, 1.49) | |
| No | 1.00 | 1.00 | |
| ‘Trying?’ Yes | 1.10 (0.84, 1.43) | 1.34 (1.02, 1.77) | |
| No | 1.00 | 1.00 | |
| ‘Tried? Yes | 0.96 (0.80, 1.15) | 1.14 (0.95, 1.37) | |
| No | |||
| ≥ 25 kg/m2 | Pre-baseline BMI | 1.03 (1.01, 1.04) | 1.03 (1.01, 1.04) |
| Weight change groupc | |||
| Loss | 1.11 (1.00, 1.25) | 1.04 (0.93, 1.17) | |
| Stable | 1.00 | 1.00 | |
| Gain | 1.03 (0.92, 1.15) | 1.03 (0.92, 1.15) | |
| Body weight control questionsd | |||
| ‘Care?’ Yes | 0.90 (0.82, 0.99) | 0.98 (0.90, 1.08) | |
| No | 1.00 | 1.00 | |
| ‘Good?’ Yes | 1.04 (0.95, 1.14) | 1.00 (0.90, 1.11) | |
| No | 1.00 | 1.00 | |
| ‘Trying?’ Yes | 1.08 (0.96, 1.22) | 1.08 (0.95, 1.23) | |
| No | 1.00 | 1.00 | |
| ‘Tried?’ Yes | 1.07 (0.97, 1.18) | 1.08 (0.97, 1.20) | |
| No | 1.00 | 1.00 |
aPre-baseline BMI is self-reported BMI 6 months prior to the examination.
bAnalyses were adjusted for pre-baseline BMI, weight change group, educational level, smoking status, alcohol consumption, leisure time physical activity and well-being; stratified by sex; age as time-axis.
cLoss’ is < 0 kg/m2 change during the recent 6 months, ‘Stable’ is 0–0.8 kg/m2 change, ‘Gain’ is > 0.8 kg/m2 change.
dThe questions are ‘Do you care for your body weight in daily life?’ (‘Care?’), ‘Do you think it will be good for your health to lose weight?’ (‘Good?’), ‘Are you currently trying to slim?’(‘Trying?’), ‘Have you tried to slim during the past 15 years?’ (‘Tried?’).