3. Variables and HRQoL
The cut-off values for the 33⅓ and 66⅔ percentiles of the preoperative EES-Q scores were 12 and 26, respectively.
LMM results of the variables and the postoperative HRQoL are shown in table 4 and the mean ESS-Q scores for the different groups of the variables are plotted in a graph (figure 2 and 3).
In exploratory analysis we found no significant correlation between the preoperative EES-Q score and the other variables (table 5). In this analysis age was dichotomised by the median (63 years).