Table 2.
Odds ratios and 95% confidence intervals for physical activity and risk of male breast cancer (n=449 cases/13855 controls)
| Physical Activity level | Low | Medium | High | p-trend |
|---|---|---|---|---|
| N (case/control) | 157/3884 | 177/5757 | 115/4214 | |
| Model 1a | 1.00 | 1.04 (0.81–1.32) | 0.92 (0.70–1.19) | 0.515 |
| Model 2b | 1.00 | 1.00 (0.79–1.28) | 0.88 (0.68–1.15) | 0.362 |
| Model 3c | 1.00 | 1.01 (0.79–1.29) | 0.90 (0.69–1.18) | 0.443 |
| Joint effectsb | ||||
| High BMI (≥25 kg/m2) | 1.00 | 1.01 (0.79–1.34) | 0.90 (0.66–1.24) | |
| Normal BMI (<25 kg/m2) | 0.83 (0.58–1.19) | 0.84 (0.59–1.18) | 0.73 (0.50–1.07) |
a
Model 1 included stratification by cohort and was adjusted for age.
b
Model 2 was additionally adjusted for race (white, black, other), educational level (high school or less, some college, completed college), marital status (married, not married), history of diabetes (yes, no), alcohol consumption (none, 1–2 drinks/day, >2 drinks/day), and smoking status (never, former, current).
c
Model 3 was additionally adjusted for body mass index (<18.5, 18.5–<25, 25–<30, 30+ kg/m2).