Table 5.

Log2 odds ratio (associated with a doubling of exposure) for urine and serum phytoestrogen levels: conditional logistic regression adjusting for body mass index, menopausal status, parity, hormone replacement therapy use, smoking, family history of breast cancer, and saturated fat intake

PhytoestrogenLog2 odds ratio for urine and serum phytoestrogen levels
Urine (adjusted for creatinine output)Serum
O-DMA1.148 (0.930–1.417; P = 0.198)1.140 (0.933–1.393; P = 0.199)
Daidzein1.123 (0.963–1.309; P = 0.138)1.220 (1.005–1.481; P = 0.044)
Genistein1.162 (0.973–1.387; P = 0.097)1.237 (0.976–1.569; P = 0.077)
Glycitein1.076 (0.869–1.333; P = 0.499)1.226 (0.946–1.588; P = 0.123)
Equol1.344 (1.063–1.699; P = 0.013)1.455 (1.051–2.017; P = 0.024)
Enterodiol1.015 (0.840–1.227; P = 0.873)0.912 (0.738–1.126; P = 0.392)
Enterolactone0.980 (0.850–1.130; P = 0.785)0.996 (0.824–1.202; P = 0.963)
  • Note: The numbers of matched sets were as follows: for urine: total observations = 325 after the model has excluded missing values, 111 cases remain, 106 of which have two matched controls and 5 of which have 1 matched control; for serum, total observations = 255 after the model has excluded missing values, 92 cases remain, 89 of which have two controls and 3 of which have 1 control.