Researchers at Johns Hopkins decide to use a case control studydesign to explore the association between women with breast cancerand DDT exposure. They interview women that have breast cancerundergoing chemo at the Johns Hopkins Hospital in Baltimore in 2014and then take blood samples to test for DDT exposure. They alsoenroll a group of controls (without breast cancer) in the studybased on patient lists at the hospital and also test them for DDTexposure. They find that that 360 of the women with breast cancerhave DDT, exposure while 1,079 do not. Among the controls 432 haveDDT exposure, and 2,446 do not.
A. Create an appropriate 2x2 table for thisdata.
| Breast Cancer (Cases) | No Breast Cancer (Controls) |
| DDT EXPOSURE | 360 | 432 |
| NO DDT EXPOSURE | 1,079 | 2,446 |
B. Calculate the odds ratio comparingthe odds of exposure for those with breast cancer to the odds ofexposure for those without breast cancer (show workplease)
C. Assume that this OR is significant. What does this ORmean (be specific using the context of this study)?
