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Table 4.

Any and hours per week of recreational physical activity and colon cancer incidence, by exercise level reported in 1982, number of cases and multivariate-adjusted RR and 95% CI, CPS II Nutrition Cohort men and women, 1992-1993 to 1999

Exercise level reported in 1982
None or slight
Moderate or heavy
Recreational physical activity in the year before study enrollment (1991-1992)No. casesMultivariate-adjusted* RR (95% CI)No. casesMultivariate-adjusted* RR (95% CI)
Total 233  707  
Recreational physical activity     
No activity 38 1.00 (reference) 80 1.00 (reference) 
Any activity 195 0.84 (0.59-1.20) 627 0.87 (0.68-1.10) 
Recreational physical activity (h/wk)     
No activity 38 1.00 (reference) 80 1.00 (reference) 
    <2 92 0.90 (0.61-1.32) 208 0.93 (0.72-1.21) 
    2-3 37 0.78 (0.49-1.23) 115 0.85 (0.64-1.14) 
    4-6 43 0.83 (0.53-1.29) 173 0.91 (0.69-1.19) 
    ≥7 23 0.74 (0.44-1.25) 131 0.74 (0.56-0.99) 
P for trend, with and without reference group  0.28, 0.43  0.007, 0.01 
Exercise level reported in 1982
None or slight
Moderate or heavy
Recreational physical activity in the year before study enrollment (1991-1992)No. casesMultivariate-adjusted* RR (95% CI)No. casesMultivariate-adjusted* RR (95% CI)
Total 233  707  
Recreational physical activity     
No activity 38 1.00 (reference) 80 1.00 (reference) 
Any activity 195 0.84 (0.59-1.20) 627 0.87 (0.68-1.10) 
Recreational physical activity (h/wk)     
No activity 38 1.00 (reference) 80 1.00 (reference) 
    <2 92 0.90 (0.61-1.32) 208 0.93 (0.72-1.21) 
    2-3 37 0.78 (0.49-1.23) 115 0.85 (0.64-1.14) 
    4-6 43 0.83 (0.53-1.29) 173 0.91 (0.69-1.19) 
    ≥7 23 0.74 (0.44-1.25) 131 0.74 (0.56-0.99) 
P for trend, with and without reference group  0.28, 0.43  0.007, 0.01 
*

Models included age, sex, education, exercise level in 1982, cigarette smoking, alcohol, red meat, folate, fiber, multivitamin use in 1982, and hormone replacement therapy (women).

Included walking, jogging/running, lap swimming, tennis or racquetball, bicycling/stationary bike, aerobics/calisthenics, and dancing.

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