Survival after Abdominoperineal and Sphincter-Preserving Resection in Nonmetastatic Rectal Cancer: A Population-Based Time-Trend and Propensity Score-Matched SEER Analysis

Figure 2

Kaplan-Meier curves for overall (panels a, c) and cancer-specific (panels b, d) survival in unadjusted and propensity score adjusted analysis. The overall survival (panels a, c) and cancer-specific survival (panels b, d) in unadjusted and propensity score adjusted analysis are depicted. The number of rectal cancer patients at risk in the two groups is given below each plot. HR: hazard ratio for APR compared with CAA with value from likelihood-ratio test.

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