| Completed | 2 | 142 | US | Conjugated Estrogens/Bazedoxifene, Laboratory Biomarker Analysis, Pharmacological Study, Placebo, placebo therapy, PLCB, sham therapy, Quality-of-Life Assessment, Quality of Life Assessment, Questionnaire Administration | Northwestern University, National Cancer Institute (NCI), Pfizer, University of Chicago - Department for Cancer Research, University of California, San Francisco | Ductal Breast Carcinoma In Situ, Postmenopausal | 06/24 | 06/24 | | |