Fig. 4
From: Circulating tumor cells as a response monitor in stage IV non-small cell lung cancer
Kaplan-Meier analysis of OS (a, b) and PFS (c, d) for stage IV NSCLC kinetic cohort. Patients are stratified according to HD-CTC dynamics, into three groups (a and c): increase, stable, or decrease, or into two groups (b and d) where stable and decreasing patients are combined. Significant benefit in terms of increased OS and PFS for patients displaying an increasing number of HD-CTCs (P-value < 0.05)