Changes

However, the authors of the Harvard study asserted that earlier studies that reported that abortion increases the risk of breast cancer had been carried out "largely" on premenopausal women.<ref>''Id.'' p. 820.</ref> This study is ''ongoing'' or ''longitudinal'' rather than retrospective, because young persons are monitored before they develop health problems rather than studying them after they develop health problems. There are advantages and disadvantages to both types of studies.

However, the authors of the Harvard study asserted that earlier studies that reported that abortion increases the risk of breast cancer had been carried out "largely" on premenopausal women.<ref>''Id.'' p. 820.</ref> This study is ''ongoing'' or ''longitudinal'' rather than retrospective, because young persons are monitored before they develop health problems rather than studying them after they develop health problems. There are advantages and disadvantages to both types of studies.

The research report concealed how almost none of the subjects of the study were African American or Hispanic,<ref>The study stated that the subjects were 92% non-Hispanic white; many of the remaining 8% must have been Filipino and other Asian groups, but the racial make-up of this group was not provided. For example, 15 percent of the registered nurses in San Diego are Asian or Filipino or other Pacific Islanders.[http://news.newamericamedia.org/news/view_article.html?article_id=37f00e50cb995f794d89f677f3c3c05e] More importantly, the researchers conceal the lack of African Americans and Hispanics, merely admitting that "The nurses in our cohort may not be representative of the social classes most likely to use abortion services."  (p. 820).</ref> Because the researchers concealed this information, the press did not report the lack of African Americans and Hispanics in the study.<ref>http://www.nytimes.com/aponline/us/AP-Abortion-Cancer.html?_r=2&oref=slogin&oref=slogin</ref><ref>http://www.sciencedaily.com/releases/2007/04/070423185607.htm</ref>

The research report concealed how almost none of the subjects of the study were African American or Hispanic,<ref>The study stated that the subjects were 92% non-Hispanic white; many of the remaining 8% must have been Filipino and other Asian groups, but the racial make-up of this group was not provided. For example, 15 percent of the registered nurses in San Diego are Asian or Filipino or other Pacific Islanders.[http://news.newamericamedia.org/news/view_article.html?article_id=37f00e50cb995f794d89f677f3c3c05e] More importantly, the researchers conceal the lack of African Americans and Hispanics, merely admitting that "The nurses in our cohort may not be representative of the social classes most likely to use abortion services."  (p. 820).</ref> Because the researchers concealed this information, the press did not report the lack of African Americans and Hispanics in the study.<ref>https://www.nytimes.com/aponline/us/AP-Abortion-Cancer.html?_r=2&oref=slogin&oref=slogin</ref><ref>https://www.sciencedaily.com/releases/2007/04/070423185607.htm</ref>

The research data show that '''abortion causes a sharp increase in the deadly progesterone receptor-negative (PR-) breast cancer'''.  "Among [[parous]] women [the overwhelming majority of the study], the [hazard ratios] HRs were 1.58 (95% CI, 1.13-2.20) for PR- breast cancer and 0.80 (95% CI, 0.60-1.05) for PR+ breast cancer (P for [[heterogeneity]] = 0.002) among women with induced abortion."<ref>Study, p. 817.</ref>  In non-statistical language, this means that the women in the study who had children (parous) were 58% more likely to get progesterone negative breast cancer if they ever had an abortion, and the same women were 25% less likely to get progesterone positive breast cancer. Among the study group there were 442 breast cancer cases among women who ever had an abortion. 59 (13%) were progesterone negative and 92 (21%) were progesterone positive.

The research data show that '''abortion causes a sharp increase in the deadly progesterone receptor-negative (PR-) breast cancer'''.  "Among [[parous]] women [the overwhelming majority of the study], the [hazard ratios] HRs were 1.58 (95% CI, 1.13-2.20) for PR- breast cancer and 0.80 (95% CI, 0.60-1.05) for PR+ breast cancer (P for [[heterogeneity]] = 0.002) among women with induced abortion."<ref>Study, p. 817.</ref>  In non-statistical language, this means that the women in the study who had children (parous) were 58% more likely to get progesterone negative breast cancer if they ever had an abortion, and the same women were 25% less likely to get progesterone positive breast cancer. Among the study group there were 442 breast cancer cases among women who ever had an abortion. 59 (13%) were progesterone negative and 92 (21%) were progesterone positive.