Figure 2: (a) Pain levels and patients’ satisfaction with pain treatment. A priori surgical pain is an anticipated procedure-specific POP intensity, depending on the size and localisation of surgical lesion defined according to [2]. Data are given as mean (SD); ; Student’s t-test. (b) Frequency of opioid-induced side effects given as percent from the total number of patients in the audits; numeric values within the bars on the graph are absolute number of patients; ; χ2 test.