Table 3 Adjusted RR for colon cancer death by 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 No. of deaths Person-years RR a 95% CI RR b 95% CI
Men
BMI at baseline (kg/m2)
<20 16 66?030 0.52 0.29–0.92e 0.44 0.21–0.93e
20–<22 42 11?1439 1.00   1.00  
22–<24 33 119?748 0.80 0.51–1.26 0.63 0.35–1.11
24–<26 22 80?532 0.86 0.51–1.43 0.65 0.33–1.27
26–<28 12 31?691 1.24 0.65–2.36 0.73 0.28–1.90
28– 2 15?259 0.44 0.11–1.81 0.64 0.15–2.69
P-value for trend     0.32   0.97
BMI at around age 20 (kg/m2)
<20 11 52?202 0.87 0.40–1.67 0.89 0.42–1.90
20–<22 23 90?432 1.00   1.00  
22–<24 30 89?552 1.20 0.70–2.06 1.03 0.56–1.89
24–<26 14 46?620 1.00 0.51–1.94 1.09 0.54–2.20
26–<28 7 15?891 1.51 0.65–3.51 1.05 0.36–3.07
28– 2 8028 0.83 0.20–3.51 1.02 0.24–4.37
P-value for trend     0.42   0.68
Women
BMI at baseline (kg/m2)
<20 24 93?436 1.28 0.72–2.28 1.61 0.73–3.56
20–<22 23 140?635 1.00   1.00  
22–<24 23 157?409 0.95 0.54–1.70 1.28 0.59–2.79
24–<26 26 110?785 1.50 0.86–2.63 2.23 1.06–4.68e
26–<28 12 54?934 1.37 0.68–2.75 2.27 0.96–5.35
28– 14 34?689 2.54 1.31–4.94d 3.41 1.44–8.06d
P-value for trend     <0.05   0.01
BMI at around age 20 (kg/m2)
<20 16 93?069 1.15 0.58–2.25 0.84 0.36–1.94
20–<22 18 117?956 1.00   1.00  
22–<24 22 106?907 1.25 0.67–2.233 1.17 0.57–2.40
24–<26 20 62?675 1.73 0.91–3.27 1.96 0.97–3.99
26–<28 11 25?559 1.99 0.94–4.23 2.54 1.15–5.64e
28– 5 12?976 1.68 0.62–4.54 1.36 0.39–4.75
P-value for trend     0.05   <0.01
  1. aAdjsuted 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.