Table 4.

Physical activity and risk of right and left colon cancer, total study population

Type of activityRight colon cancer
Left colon cancer
No. casesNo. person-yearsAge- and center-stratified hazard ratio (95% CI)*Multivariate hazard ratio (95% CI)Quartile definitions/ cut pointsNo. casesNo. person-yearsAge- and center-stratified hazard ratio (95% CI)*Multivariate hazard ratio (95% CI)
Total activity
Inactive76442,7921.01.0Inactive60442,7261.01.0
Moderately inactive157941,5810.77 (0.58-1.03)0.79 (0.59-1.06)Moderately inactive161941,5931.11 (0.82-1.51)1.10 (0.81-1.50)
Moderately active161944,6800.61 (0.46-0.82)0.64 (0.47-0.86)Moderately active220955,0761.17 (0.86-1.57)1.15 (0.84-1.56)
Active32239,2380.61 (0.40-0.94)0.65 (0.43-1.00)Active40239,2550.98 (0.65-1.47)0.96 (0.64-1.45)
Ptrend0.0010.004Ptrend0.740.83
Occupational activity
Sedentary111727,2251.01.0Sedentary102727,2031.01.0
Standing67688,5690.77 (0.56-1.05)0.79 (0.58-1.09)Standing95688,6701.24 (0.93-1.65)1.22 (0.91-1.64)
Manual/heavy manual47273,9250.85 (0.60-1.21)0.90 (0.63-1.29)Manual/heavy manual54273,9380.99 (0.71-1.38)0.95 (0.67-1.34)
Nonworker201878,5730.77 (0.58-1.03)0.81 (0.60-1.08)Nonworker230878,6121.06 (0.80-1.40)1.01 (0.76-1.35)
Ptrend0.180.29Ptrend0.890.91
Household activity (MET-h/wk)
<19.5112672,6601.01.0<19.5120672,6581.01.0
≥19.5-<39.6117681,3880.97 (0.75-1.27)0.97 (0.75-1.27)≥19.5-<39.6119681,4360.97 (0.75-1.26)0.97 (0.75-1.26)
≥39.6-<73.9110658,7490.85 (0.64-1.12)0.84 (0.64-1.12)≥39.6-<73.9131658,7721.06 (0.82-1.38)1.06 (0.82-1.38)
≥73.990617,6410.74 (0.54-1.01)0.74 (0.54-1.02)≥73.9121617,7261.03 (0.77-1.37)1.01 (0.75-1.36)
Ptrend0.040.05Ptrend0.720.78
Recreational activity (MET-h/wk)
<12.8116674,4871.01.0<12.8144674,5441.01.0
≥12.8-<24.0105665,1480.96 (0.73-1.26)0.96 (0.74-1.26)≥12.8-<24.0109665,1760.79 (0.62-1.02)0.80 (0.63-1.04)
≥24.0-<42.096657,9150.83 (0.62-1.09)0.84 (0.63-1.11)≥24.0-<42.0117657,9890.82 (0.63-1.05)0.84 (0.65-1.08)
≥45.8112632,8880.98 (0.74-1.29)1.01 (0.76-1.33)≥45.8121632,8830.83 (0.64-1.07)0.86 (0.66-1.12)
Ptrend0.650.80Ptrend0.190.31
  • * Base models are stratified by age and center and mutually adjusted for each type of physical activity (occupational, recreational, and household).

  • Multivariate models are stratified by age and center and adjusted for energy (kilocalories per day in quartiles), education (none, primary school, technical/professional school), smoking (never, former, current, unknown), height (centimeters in tertiles), weight (kilograms in tertiles), and fiber (grams per day in quartiles).