Table 4.

Oxycodone consumption and PCA demands

Groups	CON	SHAM	ESP	p value
Oxycodone consumption via PCA in mg	9.5 [5–19]a	8 [5–14]	4 [2–8]	0.014
PCA demands	9.5 [5–23]a	11 [6–17]	4 [3–9]	0.021

Data are shown as medians [interquartile ranges]. Probability was calculated with the Kruskal–Wallis test by ranks. If this test showed a significant result, a pairwise comparison was made with the Mann–Whitney U test. Significant calculated probability was set at 0.017 after the Bonferroni correction.

CON control group, ESP erector spinae plane group, PCA patient-controlled analgesia, SHAM sham block group.

^aCON is significantly higher than ESP