<prompt> A study is looking at breast cancer of women compared cases with non-cases, and found that 75100 cases used calcium supplements compared with 25100 of the non-cases. Calculate Cross product ratio96312  <response>: Odds ratio adbc Breast cancer cases Non-cases Used Ca supplements 75 a 25 b Did not use Ca supplements 25 c 75 d 100 100 Odds ratio adbc 75752525 9 