Figure 25.12 is from a study into the relative survival of two groups of patients with nonmetastatic colon cancer; one group having open colectomy (OC) and the other laparoscopyassisted colectomy...

Figure 25.12 is from a study into the relative survival of two groups of patients with non‐metastatic colon cancer; one group having open colectomy (OC) and the other laparoscopy‐assisted colectomy (LAC). The table shows the HRs and their confidence intervals after the patients were stratified according to tumour stage for the probability: of being free of recurrence, for overall survival, and for cancer‐related survival. What do you conclude from these results about the survivability with OC surgery versus LAC surgery?