Table 1 |
||||
| Characteristics of breast cancer controls in the Asian-American Breast Cancer Study by menopausal status | ||||
| Premenopausal women in luteal phase (n = 119) | Postmenopausal women (n = 72) | |||
| mean | s.d. | mean | s.d. | |
| Age (y)* | 41.2 | 5.4 | 53.0 | 3.4 |
| Body Mass Index (kg / m2) | 21.7 | 3.5 | 21.7 | 2.5 |
| n | column % | n | column % | |
| Study center, n(%) | ||||
| Hawaii | 79 | 66.4% | 48 | 66.7% |
| Los Angeles | 19 | 16.0% | 13 | 18.1% |
| San Francisco | 21 | 17.6% | 11 | 15.3% |
| Combined parity and age at first birth, n(%) | ||||
| Nulliparous | 17 | 14.3% | 11 | 15.3% |
| 1st birth age ≤ 20 y | 7 | 5.9% | 4 | 5.6% |
| 1-2 live births / age ≥ 21 | 73 | 61.3% | 28 | 38.9% |
| 3+ live births / age ≥ 21 | 22 | 18.5% | 29 | 40.3% |
| Age at menarche, n(%) | ||||
| ≤ 12 y | 72 | 60.5% | 30 | 41.7% |
| > 12 y | 47 | 39.5% | 42 | 58.3% |
| Born in Asia, n (%) | ||||
| No | 93 | 78.2% | 57 | 79.2% |
| Yes | 26 | 21.8% | 15 | 20.8% |
| Soy intake (frequency of weekly intake), n (%) | ||||
| 0-0.5 | 35 | 29.4% | 12 | 16.7% |
| 0.5 – 1.0 | 35 | 29.4% | 22 | 30.6% |
| > 1.0 | 49 | 41.2% | 38 | 52.8% |
| Green tea (frequency of weekly intake), n (%) | ||||
| <once weekly | 62 | 52.1% | 25 | 34.7% |
| 1-6 times weekly | 32 | 26.9% | 23 | 31.9% |
| 7+ times weekly | 25 | 21.0% | 24 | 33.3% |
| Black tea (frequency of weekly intake), n (%) | ||||
| <once weekly | 85 | 71.4% | 51 | 70.8% |
| 1-6 times weekly | 21 | 17.6% | 16 | 22.2% |
| 7+ times weekly | 13 | 10.9% | 5 | 6.9% |
| Coffee (frequency of weekly intake), n (%) | ||||
| 0-2 times weekly | 30 | 25.2% | 11 | 15.3% |
| 3-13 times weekly | 39 | 32.8% | 22 | 30.6% |
| ≥14 times weekly | 50 | 42.0% | 39 | 54.2% |
| Estimated weekly caffeine intake (mg), n (%) | ||||
| 0-734 | 41 | 34.5% | 23 | 31.9% |
| 734-1610 | 39 | 32.8% | 23 | 31.9% |
| >1610 | 39 | 32.8% | 26 | 36.1% |
Fuhrman et al. Nutrition Journal 2013 12:25 doi:10.1186/1475-2891-12-25
