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
Serum levels (ng/ml)Isoflavones0.29*0.31*0.31*0.05
  • 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.