Epidemiological, clinical, demographic, treatment and outcome data was obtained from RedCap. The patients had all been stratified by race according to the 7th AJCC anatomic staging system. The following patient characteristics were collected: date of diagnosis, age, race, body mass index (BMI), tumor grade, receptors (ER, PR, HER2) status and survival months. Patients were then restaged using the 8th AJCC prognostic staging system to estimate the effect of stage migration (upstaged, downstaged/ unchanged) on the stage specific survival compared to the earlier cohort. All data was collected, checked, analyzed, and interpreted by the postdoc research fellow (MN).
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