Finally, postmenopausal women who ever used hormone replacement therapy showed a decreased CC risk (OR = 0.44; 95%CI = 0.24–0.78) and almost significant decreased RC risk (OR = 0.51; 95%CI = 0.24–1.07).
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Menstrual and Reproductive Factors and Risk of Gastric and Colorectal Cancer in Spain.
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Number of children and months of lactation displayed different effects in women with low and high educational level, with the interaction term proving statistically significant (P = 0.001 and 0.040 respectively): while parity showed a positive trend among women with low educational level (primary school or less), in women with higher level of education (secondary school or university) the OR decreased by 23% for every child (P = 0.012).