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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).
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