Table 3.

Correlation matrix of dietary isoflavones and fiber (non-starch polysaccharides) intake from 7-day food diaries and urinary and serum phytoestrogen levels (n = 284–333)

Dietary intake from 7-day food diaries
Daidzein (μg/day)Genistein (μg/day)Isoflavones (μg/day)Dietary fiber non-starch polysaccharides (g/d)
Urinary levels (μg/mmol creatinine)Isoflavones0.26*0.26*0.27*0.00
    Daidzein0.26*0.27*0.27*0.03
    Genistein0.29*0.29*0.30*−0.01
    Glycitein0.21*0.21*0.21*−0.06
    O-DMA0.170.19*0.20*−0.04
    Equol0.090.100.10−0.04
Lignans0.050.060.060.17
    Enterodiol0.140.140.130.13
    Enterolactone0.060.070.070.29*
Serum levels (ng/ml)Isoflavones0.29*0.31*0.31*0.05
    Daidzein0.25*0.27*0.27*0.07
    Genistein0.29*0.32*0.32*0.05
    Glycitein0.120.120.12−0.07
    O-DMA0.21*0.23*0.24*0.00
    Equol0.140.150.150.04
Lignans0.050.060.060.23*
    Enterodiol0.070.070.070.03
    Enterolactone0.030.040.040.22*
  • Note: Pearson correlation coefficients on log-transformed data. Correlation coefficients between dietary and urine and serum levels are indicated in bold of a particular phytoestrogens. Dietary fiber is used as a surrogate indicator of dietary lignan intake.

  • *P < 0.001.

  • P < 0.01.

  • P < 0.05.