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"&amp;quot;HRT may or may not increase the risk of breast cancer, but the MWS did not establish that it does,&amp;quot; wrote epidemiological researchers in the Journal of Family Planning and Reproductive Healthcare. The MWS didn&amp;#039;t prove causality said lead researcher, Samuel Shapiro, PhD, of the University of Cape Town in South Africa, and his colleagues; the study was flawed. Why? A bias in participants, as the women who were recruited were part of breast screening program and more likely to be on HRT and aware of lumps that may have been cancer. Similarly, the study didn&amp;#039;t exclude those who had breast cancers when recruited, likely skewing the results. In addition, say researchers, crucial information such as BMI and age at menopause was missing from the data collection. Furthermore, the increase in cancer incidence &amp;quot;may not be &amp;quot;biologically plausible,&amp;quot; researchers reported because &amp;quot;the average time from recruitment to detection of breast cancer among HRT users was 1.2 to 1.7 years&amp;quot; and such cancers usually take many more years to develop. In response, MWS researchers and some American cancer experts point to the more than 20 studies that show a decrease in breast cancer rates with decrease use of HRT.  "^^<http://www.w3.org/2001/XMLSchema#string>
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