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.

Fuhrman et al. Nutrition Journal 2013 12:25   doi:10.1186/1475-2891-12-25

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