Figure 3. Recurrence-free survival, as detected by ctDNA and CEA.
(a) The difference in recurrence-free survival in subjects with detectable versus undetectable post-operative ctDNA levels (P = 0.006 by Mantel-Cox log-rank test). (b) The difference in recurrence-free survival in subjects with detectable versus undetectable post-operative CEA levels (P = 0.03 by Mantel-Cox log-rank test).