Table 3.

IRRs and 95% CIs according to plasma levels of enterolactone for total (381 pairs), ER-positive (273 pairs), and ER-negative (80 pairs) breast cancer

CasesQuartiles of serum enterolactone concentration (nmol/L)*
0.1-14.414.5-28.128.2-47.948.0-454.6
All0.77 (0.51-1.15; n = 94)1 (n = 109)0.80 (0.53-1.21; n = 96)0.55 (0.36-0.85; n = 82)
ER-positive0.77 (0.48-1.24; n = 65)1 (n = 73)0.95 (0.59-1.53; n = 71)0.67 (0.41-1.08; n = 64)
ER-negative0.61 (0.25-1.53; n = 21)1 (n = 28)0.43 (0.16-1.15; n = 17)0.26 (0.09-0.77; n = 14)
  • NOTE: Values are presented as IRR (95% CI).

  • * Quartiles for plasma enterolactone among all women. Estimates are adjusted for age and use of HRT (through matching).