From: Prospective study of physical activity and risk of postmenopausal breast cancer
Variable | Category of vigorous or non-vigorous physical activity | p | ||||
---|---|---|---|---|---|---|
 | 1 | 2 | 3 | 4 | 5 |  |
Vigorous physical activity | Â | Â | Â | Â | Â | Â |
   MET-hours/week | 0 | 0.1 to 48.9 | 49.0 to 70.0 | 70.1 to 126.0 | 126.1 to 588.0 |  |
   Cases | 614 | 236 | 234 | 218 | 204 |  |
   Person-years | 101,276 | 40,772 | 44,949 | 41,072 | 41,772 |  |
   Age-adjusted RR (95% CI) | 1.0 | 1.00 (0.86 to 1.17) | 0.89 (0.76 to 1.03) | 0.90 (0.77 to 1.06) | 0.82 (0.70 to 0.96) | 0.008 |
   Multivariate RR †§(95% CI) | 1.0 | 0.98 (0.84 to 1.14) | 0.88 (0.76 to 1.03) | 0.91 (0.78 to 1.07) | 0.86 (0.73 to 1.01) | 0.06 |
   Multivariate RR ‡ §(95% CI) | 1.0 | 0.98 (0.85 to 1.15) | 0.89 (0.76 to 1.04) | 0.92 (0.79 to 1.08) | 0.87 (0.74 to 1.02) | 0.08 |
Non-vigorous physical activity | Â | Â | Â | Â | Â | Â |
   MET hours per week | 0 to 84.0 | 84.1 to 140.0 | 140.1 to 188.0 | 188.1 to 229.0 | 229.1 to 504.0 |  |
   Cases | 317 | 314 | 283 | 287 | 305 |  |
   Person-years | 53,660 | 56,791 | 52,224 | 53,001 | 54,116 |  |
   Age-adjusted RR (95% CI) | 1.0 | 0.94 (0.80 to 1.09) | 0.91 (0.78 to 1.07) | 0.91 (0.77 to 1.06) | 0.95 (0.81 to 1.11) | 0.48 |
   Multivariate RR †|| (95% CI) | 1.0 | 0.99 (0.84 to 1.16) | 0.98 (0.83 to 1.16) | 0.97 (0.82 to 1.14) | 1.01 (0.86 to 1.18) | 0.96 |
   Multivariate RR ‡ || (95% CI) | 1.0 | 0.99 (0.84 to 1.16) | 0.99 (0.84 to 1.16) | 0.97 (0.82 to 1.14) | 1.02 (0.87 to 1.19) | 0.86 |