Pregnancy-related factors and the risk of breast carcinoma in situ and invasive breast cancer among postmenopausal women in the California Teachers Study cohort.

Breast Cancer Res · 2010 · PMC2917030 · PMID 20565829

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did not reach statistical significanceno p-value reported

Neither of these factors was statistically significantly associated with the risk of ER-negative (ER-) or ER-/PR- invasive breast cancer, tests for heterogeneity between subtypes did not reach statistical significance.

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