Table 4 Adjusted RR for colon cancer death in nine groups according to BMI at baseline and around age 20 by gender, JACC study, 1988–1999

From: A prospective study of body size and colon cancer mortality in Japan: The JACC Study

   BMI at baseline (kg/m2)
   <22 22–<26 26–
BMI around age 20 (kg/m2)
Men     
<22 No. of deaths 24   9   1  
  Person-years 91?158   43?822   7653  
  RRa 95% CI 1.00   1.00 0.46–2.15 0.67 0.09–4.96
  RRb 95% CI 1.00   0.62 0.25–1.54 0.62 0.08–4.61
22–<26 No. of deaths 17   21   6  
  Person-years 31?958   92?988   11?227  
  RRa 95% CI 1.51 0.81–2.81 0.9 0.50–1.62 2.49 1.01–6.11e
  RRb 95% CI 1.37 0.71–2.64 0.7 0.37–1.33 1.59 0.55–4.64
26– No. of deaths 0   4   5  
  Person-years 2125   7054   14?740  
  RRa 95% CI   1.71 0.59–4.93 1.48 0.56–3.89
  RRb 95% CI   1.73 0.60–5.03 0.65 0.15–2.77
Women        
<22 No. of deaths 23   5   6  
  Person-years 119877   72?788   18?359  
  RRa 95% CI 1.00   0.44 0.17–1.16 1.99 0.81–4.89
  RRb 95% CI 1.00   0.61 0.20–1.88 3.41 1.29–9.02e
22–<26 No. of deaths 9   28   5  
  Person-years 39?693   106235   23?654  
  RRa 95% CI 0.94 0.43–2.03 1.37 0.79–2.38 1.21 0.46–3.18
  RRb 95% CI 1.11 0.42–2.92 2.01 1.02–3.97e 1.64 0.53–5.05
26– No. of deaths 0   5   11  
  Person-years 4045   11?630   22?860  
  RRa 95% CI   1.54 0.58–4.06 2.07 1.01–4.26e
  RRb 95% CI   2.15 0.70–6.63 3.33 1.46–7.63d
  1. aAdjusted for age at baseline.
  2. bAdjusted for age at baseline, smoking status (never, past, current), alcohol consumption (none, past, regular), exercise (≥5, 3–4, 1–2 days/week, seldom), meat intake (3–7, 1–2 days/week, seldom), green leafy vegetable intake (3–7, 1–2 days/week, seldom) and family history of colon cancer.
  3. dP<0.01.
  4. eP<0.05.