Figure 1. Primary Tumor Resection Rates and Median Overall Survival Times for Patients with Stage IV Colorectal Cancer.

Abbreviations: OS, overall survival; PTR, primary tumor resection. Ptrend values for median overall survival times of PTR and non-PTR patients relative to the year of diagnosis were less than 0.001. The median overall survival time of PTR patients with CRC diagnosed in the year 2010 was not met.