Skip to main content

Table 4 Population attributable fractions estimated using body mass index at time of survey and body mass index at maximum

From: Using maximum weight to redefine body mass index categories in studies of the mortality risks of obesity

  BMI, time of survey BMI, maximum
BMI category (kg/m2) Pd (%) HR PAF (%) Pd (%) HR PAF (%)
Normal 29.77 1.00 0 11.76 1.00 0
Overweight 36.64 0.98 -0.75 32.92 1.28 7.20
Obese class 1 21.11 1.18 3.22 31.50 1.67 12.64
Obese class 2 12.47 1.31 2.95 23.82 2.15 12.74
Total    5.42    32.58
  1. BMI: body mass index; Pd: proportion exposed among decedents (%); HR: hazard ratio; PAF: population attributable fraction. See Table 1 for definitions of BMI categories. The PAF for each exposure category is calculated using Equation 1 in the text. PAFs are summed across exposure categories to obtain the overall PAF. Calculations are based on the sample of never-smoking adults ages 50-84.