Figure 1

Kaplan-Meier (KM) survival curves and log hazard ratio cubic spline analyses for patients identified from the SEER database by different lymph node staging schemes. (a) KM curves by LNM scheme (log rank P < 0.001) (b) KM curves by LNR scheme (log rank P < 0.001). (c) KM curves by LODDS scheme (log rank P < 0.001). (d) log hazard ratio as function of LNM. (e) log hazard ratio as function of LNR. (f) log hazard ratio as function of LODDS.