Fig. 2: Patient survival is associated with ctDNA detection results.

Kaplan–Meier curves for disease-free survival data in relation to ctDNA detection in Plasma obtained after surgery before initiation of adjuvant treatment (a) and after completion of adjuvant treatment (c). b, d show Kaplan–Meier curves of overall survival data in relation to ctDNA detection in the same samples as disease-free survival curves. ctDNA+: ctDNA was detected; ctDNA−: ctDNA was not detected. The number of patients in each group and the log-rank p value are shown.