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Local recurrence-free survival (91 days–5 years). HR hazard ratio, CI two-sided 95% confidence interval. A Kaplan–Meier analysis over all stages: 5-year recurrence-free survival rate open versus laparoscopic: 72.1 versus 83.6%, p < 0.001. B Multivariate Cox regression analysis over all stages, adjustment for age, synchronous carcinomas, location, grading, TNM stage, hospital classification, resection group, and pre- and postoperative therapy; reference: open approach
