Table 1.
Baseline characteristics by total fat intake among 85,089 postmenopausal women in the Multiethnic Cohort study, 1993–1996
| Quintiles of total fat intake (% energy) |
|||||
|---|---|---|---|---|---|
| <23.4 | 23.4–<27.8 | 27.8–<31.5 | 31.5–<35.7 | ≥35.7 | |
| No. of participants | 17,169 | 17,243 | 17,001 | 16,854 | 16,822 |
| Age at cohort entry (mean ± SD), y | 63.1 ± 7.6 | 62.3 ± 7.7 | 61.7 ± 7.9 | 61.1 ± 8.0 | 60.2 ± 8.1 |
| Ethnicity, % | |||||
| African American | 13.7 | 15.7 | 19.1 | 22.2 | 32.6 |
| Native Hawaiian | 5.8 | 6.4 | 7.0 | 7.0 | 6.5 |
| Japanese American | 38.8 | 33.5 | 27.5 | 21.8 | 12.1 |
| Latina | 17.6 | 20.9 | 23.6 | 25.6 | 25.1 |
| White | 24.1 | 23.6 | 22.9 | 23.5 | 23.7 |
| Family history of breast cancer, % | 11.3 | 11.4 | 11.6 | 11.3 | 12.0 |
| Education (>high school), % | 52.0 | 51.5 | 50.4 | 49.3 | 46.8 |
| BMI at cohort entry, % | |||||
| <25 kg/m2 | 58.5 | 50.6 | 44.3 | 40.8 | 33.9 |
| 25–<30 kg/m2 | 29.1 | 32.0 | 33.8 | 34.1 | 33.4 |
| ≥30 kg/m2 | 12.4 | 17.4 | 21.9 | 25.1 | 32.7 |
| Smoking status, % | |||||
| Never | 61.5 | 59.4 | 56.6 | 53.6 | 45.9 |
| Former | 29.4 | 29.9 | 30.6 | 30.5 | 31.6 |
| Current | 9.1 | 10.7 | 12.8 | 15.9 | 22.6 |
| Age at menarche, % | |||||
| ≤12 y | 45.7 | 47.8 | 48.2 | 49.3 | 50.9 |
| 13–14 y | 40.1 | 39.1 | 39.1 | 38.7 | 36.8 |
| ≥15 y | 14.2 | 13.1 | 12.7 | 12.0 | 12.3 |
| Age at first live birth, % | |||||
| No children | 14.1 | 12.4 | 12.2 | 11.7 | 12.2 |
| ≤20 y | 23.4 | 26.4 | 29.5 | 33.2 | 39.8 |
| 21–<31 y | 55.9 | 54.1 | 52.3 | 49.3 | 43.4 |
| ≥31 y | 6.6 | 7.0 | 6.1 | 5.8 | 4.7 |
| Number of children for parous women, % | |||||
| 1 | 13.1 | 12.3 | 12.7 | 11.9 | 12.8 |
| 2–3 | 52.7 | 51.3 | 48.0 | 46.6 | 44.0 |
| ≥4 | 34.3 | 36.3 | 39.4 | 41.6 | 43.3 |
| Age at and type of menopause, % | |||||
| Natural | |||||
| <45 y | 9.3 | 9.6 | 9.9 | 10.6 | 11.9 |
| 45–<50 y | 19.3 | 19.5 | 19.8 | 20.2 | 19.9 |
| 50–<55 y | 27.9 | 27.6 | 26.4 | 24.6 | 21.3 |
| ≥55 y | 7.9 | 7.0 | 7.2 | 6.5 | 5.3 |
| Oophorectomy | |||||
| <45 y | 9.8 | 10.0 | 10.4 | 10.5 | 12.5 |
| 45–<50 y | 5.0 | 5.3 | 5.1 | 5.0 | 4.9 |
| ≥50 y | 3.1 | 2.9 | 2.5 | 2.4 | 2.1 |
| Hysterectomy | |||||
| <45 y | 13.0 | 13.5 | 14.3 | 15.4 | 17.6 |
| 45–<50 y | 3.4 | 3.4 | 3.1 | 3.6 | 3.3 |
| ≥50 y | 1.3 | 1.3 | 1.4 | 1.3 | 1.2 |
| Use of hormone replacement therapy, % | |||||
| No current or past estrogen use | 43.3 | 43.9 | 45.9 | 47.4 | 50.5 |
| Past estrogen use with or without progesterone | 18.8 | 19.0 | 19.4 | 19.1 | 19.5 |
| Current estrogen-only use | 17.0 | 16.4 | 15.9 | 15.8 | 14.8 |
| Current estrogen use with past/current progesterone | 20.9 | 20.8 | 18.9 | 17.8 | 15.2 |
| Energy intake, kcal/d | 1,770 ± 800 | 1,871 ± 876 | 1,952 ± 927 | 2,023 ± 995 | 2,073 ± 1,079 |
| Alcohol use at least once a month in the past year, % | 33.6 | 36.0 | 36.9 | 38.7 | 37.9 |