Figure 4.

Body-mass index vs cardiac mortality among never-smokers in Chennai, India (A) and Europe and North America (B)

Rate ratios were adjusted for major confounders (ie, age, sex, social factors, and alcohol in Chennai, and age and sex in Europe and North America), excluding early follow-up (2 years in Chennai, 5 years in Europe and North America), those with pre-existing chronic disease at baseline, and those with body-mass indices <15 kg/m² and >35 kg/m². Estimates for Europe and North America are from the Global BMI Mortality Collaboration.⁴ For each body-mass index category, the area of the square is inversely proportional to the variance of the category-specific log risk, which also determines the 95% CI (represented by error bars).