Table 3.

Hazard ratios (95% confidence intervals) for all-cause mortality by BMI category for never-smokers without pre-existing disease after deletion of the first 5 years of follow-up. All analyses are adjusted for age and sex

Data source	Sample size	Underweight BMI <18.5	Overweight BMI 25–29.9	Obesity Grade I BMI 30–34.9	Obesity Grade II/III BMI ≥35 *
Global BMI Mortality Collaboration[20] †	3,951,455	1.47 (1.39,1.55)	1.11 (1.10, 1.11)	1.44 (1.41, 1.47)	1.92 (1.86, 1.98)
Yi et al [21]	6,077,755	1.63 (1.60, 1.66)	0.91 (0.90, 0.91)	1.10 (1.08, 1.13)	1.34 (1.23, 1.46)
Combined	10,029,210	1.61 (1.58, 1.64)	1.02 (1.02, 1.03)	1.27 (1.25, 1.29)	1.84 (1.79, 1.90)

^*Grade II obesity (BMI 35–<40) for GBMC[20] and Grade II/III obesity (BMI ≥ 35) for Yi et al.[21]. The hazard ratio for Grade III obesity in the GBMC was 2.71 (2.55, 2.86)

^†Results shown in eTable 5 of Supplemental Appendix