Fig. (10) EQ-5D results in the course of the study. The EQ-5D assessment 12 months postoperatively shows maximum score (1.0) in 24 patients, 0.73 for two patients, 0.80 for two patients and 0.85 for one patient. The improvements compared to the baseline values (screening) are significant (six weeks: p = 0.001, three months: p < 0.001, 12 months: p < 0.001), Wilcoxon Signed Ranks Test).