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Data in epidemiological studies sometimes are collected off-schedule from planned study visits. In an ancillary study to the Study of Women’s Health Across the Nation (SWAN), longitudinal breast density data were collected retrospectively from mammograms that were not acquired at the study visits. We propose a method to estimate the off-schedule breast density measurements at the time of study visits...
Background: Among 50- to 69-year-old women, randomized clinical trials show breast cancer mortality reductions from screening mammography. However, few studies examine the long-term health effects and outcomes from screening mammography in community practice. The purpose of this study was to evaluate one approach for determining the effectiveness of screening mammography, as it is practiced in community...
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