Fig. 2.

Forrest plots of estimated hazard ratios (HRs) for (A) CTC detection and OS, B) CTC detection and PFS, C) CTC detection and DFS, D) CTC detection using RT-PCR and OS, E) CTC detection using RT-PCR and DFS, F) CTC detection using CELLSEARCH and OS, G) CTC detection using other methods and OS, H) baseline CTC detection and OS, I) baseline CTC detection and DFS, and (J) CTC detection during surgery and OS

CTCs – circulating tumour cells; OS – overall survival; PFS – progression-free survival; DFS – disease-free survival; RT-PCR – reverse transcriptase polymerase chain reaction