colorectal cancer, folate, Incidence, 0.71 (0.52-0.96) Health height, history colon cancer, Ptrend:0.04 Professionals of endoscopy, Follow-up pack-years of smoking before Study, 466/ age 30, Prospective 46 632 Q65 vs Q61 processed meat Cohort, 14 M, Incidence, 0.95 (0.56-1.60) Health rectal cancer Ptrend:0.37 professionals Age, BMI, 152/ Incidence, Active vs smoking habits, 29 133 0.82 (0.59-1.13) Beta-Carotene colon cancer sedentary supplement 12 years Cancer group Colbert, 2001 Prevention col00384 Study, Unknown Questionnaire Finland Prospective Incidence, Active vs Age, supplement Cohort, 104/ 0.93 (0.63-1.37) rectal cancer, sedentary group Age: 50-69 M, Male Smokers PHS, Prospective Lee, 1997 Cohort, 217/ Incidence, vs ≥5 ≤1 COL00150 Age: 40-84 21 807 Questionnaire 1.10 (0.70-1.60) Age colon cancer, times/week USA years, 10.9 years M, Physicians
colorectal cancer, folate, height, history of endoscopy, pack-years of smoking before age 30, processed meat Health Professionals Follow-up Study, Prospective Cohort, M, Health professionals 466/ 46 632 14 Incidence, colon cancer, Q65 vs Q61 0.71 (0.52-0.96) Ptrend:0.04 Incidence, rectal cancer 0.95 (0.56-1.60) Ptrend:0.37 Colbert, 2001 col00384 Finland Beta-Carotene Cancer Prevention Study, Prospective Cohort, Age: 50-69 M, Male Smokers 152/ 29 133 12 years Unknown Questionnaire Incidence, colon cancer Active vs sedentary 0.82 (0.59-1.13) Age, BMI, smoking habits, supplement group 104/ Incidence, rectal cancer, Active vs sedentary 0.93 (0.63-1.37) Age, supplement group Lee, 1997 COL00150 USA PHS, Prospective Cohort, Age: 40-84 years, M, Physicians 217/ 21 807 10.9 years Questionnaire Incidence, colon cancer, ≥5 vs ≤1 times/week 1.10 (0.70-1.60) Age