Table 1 Hormone levels among postmenopausal women not taking hormones in the Nurses' Health Study and the individual association between each hormone and breast cancer risk overall and for estrogen receptor-positive tumors

Estrone (pg/ml)

28 (15 to 49)

24 (14 to 43)

2.1 (1.3 to 3.4)

2.8 (1.5 to 5.3)

Estradiol (pg/ml)

8 (4 to 17)

6 (4 to 14)

2.4 (1.4 to 4.1)

2.9 (1.4 to 5.9)

Estrone sulfate (pg/ml)

276 (102 to 733)

222 (98 to 577)

2.4 (1.5 to 3.9)

2.2 (1.2 to 4.0)

Testosterone (ng/ml)

24 (14 to 49)

22 (12 to 40)

1.8 (1.1 to 2.9)

2.0 (1.0 to 3.7)

Androstenedione (ng/ml)

63 (35 to 108)

57 (30 to 108)

2.1 (1.3 to 3.6)

2.6 (1.3 to 5.0)

DHEA (ng/dl)

234 (104 to 506)

218 (93 to 435)

1.5 (0.9 to 2.4)

1.6 (0.9 to 2.9)

DHEAS (μg/dl)

92 (41 to 224)

85 (33 to 175)

2.5 (1.4 to 4.2)

2.0 (1.0 to 3.8)

Prolactin (ng/ml)

8.2 (4.9 to 14.8)

8.0 (4.9 to 14.0)

1.1 (0.7 to 1.7)

1.7 (0.9 to 3.1)

IGF-1 (ng/ml)

152 (98 to 252)

153 (98 to 242)

1.1 (0.6 to 2.0)

1.4 (0.7 to 2.7)

c-peptide (ng/ml)

1.71 (0.66 to 4.11)

1.53 (0.61 to 4.03)

1.4 (0.8 to 2.4)

1.4 (0.7 to 3.0)