Table 4.
Mortality rates and hazard ratio for all-cause mortality between categories of body mass index in the Tromsø study 1986-2008 until end of follow up on December 31, 2015
| Person Time (Years) | Died | Mortality rate | Hazard ratio a | 95% CI | |
|---|---|---|---|---|---|
| Body mass index | |||||
| < 18.5 Kg/m2 | 5121 | 109 | 0.021 | 1.69 | (1.38- 2.06) |
| 18.5-22.99 Kg/m2 | 129,676 | 1122 | 0.009 | 1.14 | (1.05- 1.25) |
| 23-24.99 kg/m2 (ref) | 107,253 | 1026 | 0.010 | 1.00 | Reference |
| 25-29.99 kg/m2 | 169,612 | 2160 | 0.013 | 0.97 | (0.90- 1.05) |
| > 30 kg/m2 | 46,709 | 855 | 0.018 | 1.12 | (1.02- 1.23) |
| Self-Reported Health | |||||
| Poor | 10,762 | 416 | 0.039 | 2.54 | (1.88- 3.45) |
| Not so good | 117,369 | 2581 | 0.022 | 1.94 | (1.55- 2.43) |
| Good | 259,293 | 2045 | 0.008 | 1.30 | (1.10- 1.54) |
| Very good (ref) | 70,947 | 230 | 0.003 | 1.00 | Reference |
| Time varying covariates | |||||
| Self-Reported Health | 0.004 | (1.00- 1.02) | |||
aHazard ratios (HR) are based on Cox proportional hazard and includes both SRH and BMI controlled for age, gender, comorbidity, mental health symptoms, systolic blood pressure, cholesterol, physical activity levels and daily smoking. For HRs shown in Table 4, is SRH time-varying but BMI time-invariant