Problem
Review the following description and decide if the study can be best categorized as case control, cohort (prospective or retrospective), cross-sectional, ecological, or experimental (RCT), and then fill in criteria for the study:
In 2010, the medical records of 1,200 pre-menopausal women who had been admitted several Detroit hospitals between 1992 and 2000 for hysterectomies or other unrelated procedures were assembled to study if hysterectomy reduced the risk of breast cancer. The medical records were linked to data from the state cancer registry to identify cases of breast cancer among the women from 1992 to 2000. What type of study is this?