SAR HS 300 Study Guide - Midterm Guide: National Health Interview Survey, Cancer Staging, Breast Cancer Screening
3 Jan 2017
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Breast cancer screening: effect of three decades of screening mammography on breast- Summary: led to significant increase in early stage cancer detection, did not lead to decrease in late stage cancer. Effective cancer screening program should have succeeded in both. Study aim: quantify the expected increase in the incidence of early-stage cancer and determined the extent to which this has led to a corresponding decrease in the incidence of late-stage cancer from 1976 . Methods: data sources: breast cancer incidence: seer cancer registry, screening rates: national health interview survey, population estimates women > 40 years: us census data. Carcinoma in situ (early stage): ductal carcinoma in situ. Localized disease (early stage): defined as invasive cancer that is confined to the organ of disease origin; Regional disease (late stage): defined as disease that extends outside of and adjacent to or contiguous with the organ of disease origin (in breast cancer, most regional disease indicates nodal involvement, not direct extension)
