Figure 4.
Relative risk of IHD admission since baseline associated with 5 kg m−2 increase in BMI among those with BMI ⩾20 kg m−2 (n=151 751), in a range of population subgroups. Crude rates are per 1000 person-years. HR* adjusted for age and sex only. HR# adjusted for age, sex, region of residence, household income, education, smoking, alcohol intake and health insurance. HRs are plotted on a log scale and are represented with squares with areas inversely proportional to the variance of the logarithm of the HR, providing an indication of the amount of statistical information available; 95% CIs are indicated by horizontal lines. PA sessions per week: number of physical activity session per week, weighted for intensity. Health insurance includes private health insurance or Department of Veterans Affairs health card. CI, confidence intervals; HR, hazards ratios; MOS-PF, Medical Outcomes Score—Physical Functioning; p-years, person years.