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Table 3 Age and multivariate a adjusted HR estimates for rectal cancer with 95% CI among 602,242 Norwegian men and women ever smokers according to selected covariates and never smokers as reference group

From: Smoking increases rectal cancer risk to the same extent in women as in men: results from a Norwegian cohort study

 

Men

Women

Ever smokers

Cases n = 1038

Multivariate adjustedaHR (95% CI)

Cases n = 490

Multivariate adjustedaHR (95% CI)

Body mass index (kg/m2)

    

<25

484

1.17(1.01-1.36)

296

1.18(1.01-1.39)

25-29

466

1.33(1.15-1.54)

145

1.39(1.15-1.70)

≥30

88

1.53(1.20-1.95)

49

1.39(1-15-1.70)

Duration of education (years)b

    

<10

356

1.20(1.02-1.40)

185

1.22(1.02-1.47)

10-12

497

1.26(1.09-1.45)

248

1.31(1.11-1.55)

≥13

185

1.41(1.17-1.70)

57

1.28(0.96-1.70)

Level of physical activityc

    

Sedentary

241

1.36(1.15-1.62)

125

1.30(1.06-1.60)

Moderate

550

1.27(1.10-1.46)

292

1.24(1.05-1.46)

Heavy

247

1.22(1.03-1.45)

73

1.39(1.07-1.79)

  1. aAdjusted for age, body mass index, physical activity all at enrollment and duration of education. bNot at enrollment. cLevel of physical activity; sedentary (reading, watching television, and sedentary activity), moderate (walking, bicycling, or similar activities ≥4 hours per week), and heavy (light sports or heavy gardening ≥4 hours per week, heavy exercise or daily competitive sports).