Table 2 Incidence rate ratios (IRR) and 95% CIs for colon and rectal cancer in men and women according to intake of total and individual wholegrain products, the Danish Diet, Cancer and Health study

From: Intake of wholegrain products and risk of colorectal cancers in the Diet, Cancer and Health cohort study

  Colon cancer Rectal cancer
Wholegrain product variables No. of cases Crude IRR (95% CI) a Adjusted IRR (95% CI) b No. of cases Crude IRR (95% CI) a Adjusted IRR (95% CI) c
Men
 Total wholegrain products (per every 50 g increment) By categories of daily total wholegrain product intake (g per day) 244 0.83 (0.76–0.92) 0.85 (0.77–0.94) 169 0.88 (0.79–0.98) 0.90 (0.80–1.01)
Group 1: 75 (g per day) 61 1.00 1.00 32 1.00 1.00
Group 2: 75 to 115 (g per day) 61 0.91 (0.64–1.30) 0.95 (0.66–1.35) 49 1.40 (0.90–2.19) 1.45 (0.93–2.26)
Group 3: 115 to 160 (g per day) 46 0.66 (0.45–0.96) 0.70 (0.47–1.03) 30 0.81 (0.49–1.33) 0.84 (0.51–1.39)
Group 4: >160 (g per day) 76 0.56 (0.40–0.78) 0.61 (0.43–0.86) 58 0.82 (0.53–1.26) 0.88 (0.57–1.36)
 Wholegrain Rye bread (per every 25 g increment)d 244 0.93 (0.87–1.00) 0.94 (0.88–1.01) 169 0.96 (0.88–1.04) 0.97 (0.89–1.05)
 Wholegrain bread (per every 25 g increment)d 244 0.89 (0.82–0.96) 0.89 (0.82–0.97) 169 0.94 (0.86–1.03) 0.95 (0.86–1.04)
 Oatmeal (per every 25 g increment)d 244 0.94 (0.77–1.15) 0.95 (0.77–1.17) 169 0.79 (0.61–1.03) 0.80 (0.62–1.04)
Women
 Total wholegrain products (per every 50 g increment) By categories of daily total wholegrain product intake (g per day) 217 0.96 (0.86–1.07) 0.98 (0.88–1.10) 114 1.01 (0.87–1.18) 1.02 (0.88–1.19)
Group 1: 75 (g per day) 57 1.00 1.00 38 1.00 1.00
Group 2: 75 to 115 (g per day) 62 1.03 (0.72–1.47) 1.08 (0.75–1.56) 28 0.69 (0.43–1.13) 0.70 (0.43–1.14)
Group 3: 115 to 160 (g per day) 47 1.05 (0.71–1.54) 1.13 (0.77–1.67) 16 0.54 (0.30–0.96) 0.54 (0.30–0.97)
Group 4: >160 (g per day) 51 0.85 (0.58–1.23) 0.92 (0.63–1.35) 32 0.80 (0.50–1.28) 0.81 (0.50–1.30)
 Wholegrain Rye bread (per every 25 g increment)d 217 1.01 (0.92–1.10) 1.01 (0.92–1.11) 114 1.04 (0.92–1.17) 1.04 (0.92–1.18)
 Wholegrain bread (per every 25 g increment)d 217 0.96 (0.89–1.05) 0.97 (0.89–1.06) 114 1.04 (0.94–1.16) 1.05 (0.94–1.16)
 Oatmeal (per every 25 g increment)d 217 1.12 (0.91–1.38) 1.14 (0.92–1.40) 114 0.80 (0.58–1.11) 0.81 (0.58–1.12)
  1. Abbreviations: IRR=incidence rate ratio; CI=confidence interval.
  2. aUnadjusted analysis.
  3. bAnalysis adjusted for body mass index, alcohol intake, school education, intake of red and processed meat, use of hormone replacement therapy (women only) and leisure time physical activity.
  4. cAnalysis adjusted for body mass index, alcohol intake, school education and intake of red and processed meat and use of hormone replacement therapy (women only).
  5. dThe variables were mutually adjusted in analyses.