Table 2.

Visual analogue scale and patients control intravenous analgesia data

Variable	Group PRE	Group POST	95% Confidence interval	P
	(n = 30)	(n = 31)
Visual analogue scale (24 h)	2.0 [0.5,3.0]	2.0 [1.0,3.0]		0.534a
Visual analogue scale (48 h)	1.0 [1.0,2.0]	1.0 [0,2.0]		0.685a
Time to first PCIA trigger (min)	211.5 ± 35.3	229.1 ± 42.1	(− 126.3,91.3)	0.523b
Consumption of oxycodone during 24 h (mg)	32 [24,52]	32 [16,56]		0.749a
Consumption of oxycodone from 24 h to 48 h (mg)	4 [0,4]	4 [0,20]		0.443a

Values represent the mean ± SD, or the median [25th percentile, 75th percentile]

^aMann–Whitney U test

^bStudent’s t test