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Table 3 Meta-analyses on the association between dietary patterns and breast cancer risk according to ER subtypes within strata of menopausal status

From: Associations between dietary patterns and the risk of breast cancer: a systematic review and meta-analysis of observational studies

  Premenopausal Postmenopausal
No. of studies RR (95% CI) P Heterogeneity χ2 I2 (%) P Heterogeneity No. of studies RR (95% CI) P Heterogeneity χ2 I2 (%) P Heterogeneity
Prudent
 ER+ and/or PR + 2 0.39(0.08, 1.88) 0.243 14.15 92.9 < 0.001 6 0.87(0.69, 1.09) 0.246 22.06 77.3 0.001
 ER− and/or PR− 2 0.47(0.13, 1.70) 0.255 3.87 74.1 0.049 5 0.72(0.49, 1.06) 0.102 13.15 69.6 0.011
Western
 ER+ and/or PR+ 3 1.08(0.83, 1.41) 0.532 2.36 15.3 0.307 7 1.15(0.99, 1.34) 0.057 10.26 41.5 0.114
 ER− and/or PR− 3 0.94(0.67, 1.33) 0.760 0.13 0 0.936 6 0.91(0.81, 1.01) 0.322 7.29 31.4 0.200
  1. ER, estrogen receptor; PR, progesterone