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Objectives
To compare the effectiveness of chemotherapy in prolonging survival according to age in breast and colon cancer.
Design
Retrospective cohort study with a matched cohort analysis based on the conditional probability of receiving chemotherapy.
Setting
The 16 Surveillance, Epidemiology, and End Results (SEER) areas from the SEER‐Medicare linked database.
Participants
Women diagnosed...
Aim The prognostic effects of chemotherapy and various lymph node measures [positive nodes, total node count and the positive lymph node ratio (PLNR)] have been established. It is unknown whether the cancer‐specific survival benefit of chemotherapy differs across these nodal prognostic categories.
Method This retrospective analysis of linked Surveillance, Epidemiology and End Results (SEER) data...
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