Table 1.
Age-standardized means and proportions of baseline cohort characteristics by total milk and meat intake
| Total milk intake (g/week)
|
Total meat intake (g/week)
|
|||
|---|---|---|---|---|
| 0 | ≥1,000 | <400 | ≥1,000 | |
| Total n | 3,471 | 13,787 | 10,370 | 14,760 |
| n (cases) | 293 | 279 | 229 | 338 |
| Age (years) | 39.0 | 38.7 | 38.7 | 38.5 |
| BMI (kg/m2) | 26.8 | 28.6 | 26.5 | 29.3 |
| Education (%) | ||||
| ≤12 years | 15.8 | 18.5 | 17.3 | 19.1 |
| 13–15 years | 31.5 | 36.3 | 35.1 | 37.1 |
| ≥16 years | 52.6 | 45.2 | 47.4 | 43.6 |
| Smoking (%) | ||||
| Never | 63.9 | 65.0 | 68.9 | 61.7 |
| Former | 20.7 | 19.4 | 17.9 | 19.9 |
| Current | 15.3 | 15.4 | 13.1 | 18.2 |
| Alcohol (%) | ||||
| Non-drinker | 74.1 | 75.8 | 88.1 | 81.6 |
| 1–3 drinks/week | 11.1 | 12.4 | 2.3 | 2.7 |
| ≥4 drinks/week | 14.3 | 11.1 | 8.7 | 14.8 |
| Family history | 6.7 | 6.1 | 6.6 | 6.6 |
| Breast cancer (%) | ||||
| Age at menarche (years) | 12.3 | 12.3 | 12.3 | 12.3 |
| Age at first live birth (years) | 22.3 | 22.4 | 22.3 | 22.1 |
| Nulliparous (%) | 43.2 | 34.1 | 39.5 | 34.7 |
| Menopausal statusa (%) | ||||
| Premenopausal | 76.6 | 76.7 | 76.6 | 77.4 |
| Postmenopausal | 16.8 | 17.1 | 17.2 | 16.9 |
| Strenuous physical activity (%) | ||||
| None | 32.4 | 29.7 | 29.1 | 33.4 |
| ≤2 h/week | 34.1 | 38.1 | 36.6 | 37.9 |
| >2 h/week | 30.1 | 28.5 | 30.8 | 25.2 |
Directly age standardized to the age distribution of the analytic cohort
a
Unknown status not shown