TABLE 4.
Association between breast cancer and physical activity among postmenopausal women not recently exposed to hormones
| Non-Hispanic white | Hispanic/American Indians | |||||
|---|---|---|---|---|---|---|
| Controls | Cases | Controls | Cases | |||
| No. | No. | OR (95% CI)* | No. | No. | OR (95% CI) | |
| Total MET hr/wk referent year | ||||||
| <5 hr/wk | 107 | 88 | 1.00 | 98 | 80 | 1.00 |
| 5–14.9 hr/wk | 95 | 67 | 0.92 (0.60, 1.41) | 50 | 45 | 0.82 (0.48, 1.41) |
| 15–29.9 hr/wk | 82 | 58 | 0.93 (0.59, 1.46) | 50 | 32 | 0.58 (0.32, 1.04) |
| ≥30 hr/wk | 98 | 61 | 0.83 (0.53, 1.30) | 43 | 22 | 0.47 (0.25, 0.89) |
| p Trend | 0.46 | <0.01 | ||||
| Vigorous hr/wk referent year | ||||||
| None | 168 | 123 | 1.00 | 138 | 116 | 1.00 |
| <1 hr/wk | 97 | 80 | 1.20 (0.81, 1.78) | 45 | 36 | 0.87 (0.51, 1.49) |
| 1–2.9 hr/wk | 76 | 41 | 0.79 (0.50, 1.25) | 36 | 16 | 0.43 (0.22, 0.85) |
| ≥3 hr/wk | 41 | 30 | 1.00 (0.58, 1.73) | 22 | 11 | 0.58 (0.26, 1.30) |
| p Trend | 0.64 | 0.02 | ||||
| Lifetime Total Activity Score | ||||||
| 0–3 | 88 | 84 | 1.00 | 85 | 71 | 1.00 |
| 4–6 | 96 | 74 | 0.82 (0.53, 1.27) | 75 | 61 | 0.89 (0.55, 1.45) |
| 7–9 | 134 | 79 | 0.60 (0.39, 0.91) | 56 | 35 | 0.70 (0.40, 1.22) |
| 10–12 | 64 | 37 | 0.60 (0.36, 1.02) | 25 | 12 | 0.52 (0.23, 1.16) |
| p Trend | 0.01 | 0.07 | ||||
| Lifetime vigorous hr/wk | ||||||
| None | 38 | 27 | 1.00 | 49 | 42 | 1.00 |
| < 1 hr/wk | 121 | 110 | 1.25 (0.71, 2.22) | 82 | 70 | 0.82 (0.47, 1.42) |
| 1–2.9 hr/wk | 115 | 71 | 0.86 (0.47, 1.55) | 70 | 47 | 0.67 (0.37, 1.20) |
| ≥3 hr/wk | 108 | 66 | 0.81 (0.44, 1.47) | 40 | 20 | 0.48 (0.23, 1.00) |
| p Trend | 0.07 | 0.03 | ||||
| Total MET hr/wk at age 50 | ||||||
| <5 hr/wk | 63 | 57 | 1.00 | 75 | 67 | 1.00 |
| 5–14.9 hr/wk | 74 | 64 | 1.04 (0.63, 1.73) | 44 | 33 | 0.81 (0.45, 1.46) |
| 15–29.9 hr/wk | 82 | 42 | 0.61 (0.36, 1.04) | 35 | 26 | 0.87 (0.46, 1.65) |
| ≥30 hr/wk | 146 | 97 | 0.76 (0.48, 1.21) | 74 | 43 | 0.61 (0.36, 1.04) |
| p Trend | 0.10 | 0.08 | ||||
| Vigorous hr/wk at age 50 | ||||||
| None | 127 | 107 | 1.00 | 130 | 111 | 1.00 |
| < 1 hr/wk | 86 | 66 | 0.99 (0.64, 1.51) | 38 | 27 | 0.69 (0.38, 1.24) |
| 1–2.9 hr/wk | 71 | 31 | 0.52 (0.31, 0.86) | 32 | 16 | 0.53 (0.27, 1.06) |
| ≥3 hr/wk | 79 | 55 | 0.82 (0.52, 1.28) | 26 | 15 | 0.61 (0.29, 1.28) |
| p Trend | 0.11 | 0.04 | ||||
| Total MET hr/wk at age 30 | ||||||
| <5 hr/wk | 74 | 73 | 1.00 | 89 | 62 | 1.00 |
| 5–14.9 hr/wk | 72 | 53 | 0.77 (0.47, 1.26) | 32 | 35 | 1.48 (0.80, 2.73) |
| 15–29.9 hr/wk | 58 | 45 | 0.75 (0.44, 1.26) | 36 | 26 | 1.09 (0.58, 2.05) |
| ≥30 hr/wk | 177 | 102 | 0.56 (0.37, 0.85) | 83 | 56 | 1.01 (0.62, 1.66) |
| p Trend | <0.01 | 0.90 | ||||
| Vigorous hr/wk at age 30 | ||||||
| None | 143 | 116 | 1.00 | 133 | 102 | 1.00 |
| <1 hr/wk | 78 | 51 | 0.86 (0.56, 1.35) | 29 | 29 | 1.18 (0.65, 2.16) |
| 1–2.9 hr/wk | 68 | 41 | 0.73 (0.46, 1.17) | 33 | 23 | 0.82 (0.44, 1.53) |
| ≥3 hr/wk | 92 | 65 | 0.86 (0.57, 1.30) | 44 | 25 | 0.71 (0.39, 1.27) |
| p Trend | 0.33 | 0.23 | ||||
| Total MET hr/wk at age 15 | ||||||
| <15 hr/wk | 101 | 104 | 1.00 | 97 | 68 | 1.00 |
| 15–39.9 hr/wk | 96 | 46 | 0.46 (0.29, 0.73) | 47 | 40 | 1.23 (0.71, 2.13) |
| 40–89.9 hr/wk | 84 | 61 | 0.66 (0.43, 1.03) | 43 | 31 | 1.05 (0.59, 1.88) |
| ≥90 hr/wk | 99 | 62 | 0.57 (0.37, 0.88) | 51 | 39 | 1.10 (0.63, 1.90) |
| p Trend | 0.03 | 0.79 | ||||
| Vigorous hr/week at age 15 | ||||||
| None | 115 | 96 | 1.00 | 100 | 83 | 1.00 |
| <1 hr/wk | 39 | 40 | 1.27 (0.74, 2.16) | 32 | 16 | 0.59 (0.30, 1.19) |
| 1–2.9 hr/wk | 71 | 39 | 0.66 (0.40, 1.07) | 34 | 28 | 1.07 (0.58, 1.96) |
| ≥3 hr/wk | 155 | 98 | 0.74 (0.51, 1.09) | 72 | 50 | 0.84 (0.51, 1.37) |
| p Trend | 0.05 | 0.62 | ||||
CI = confidence interval; MET = metabolic equivalent of the task (value); OR = odds ratio.
*
ORs and 95% CIs adjusted for age, center, parity, body mass index, and energy intake.