Table 2.

Differences in Postoperative Analgesia; Measured by Modified CHEOPS

Time	Group A (n = 40)	Group B (n = 40)	P valuea,*
On PACU admission	1.10 ± 0.03	1.00 ± 0.05	0.132
1 hr PO	1.30 ± 0.05	1.00 ± 0.07	0.121
4 hr PO	2.00 ± 0.04	1.92 ± 0.05	0.198
8 hr PO	5.13 ± 1.1	1.95 ± 0.03	< 0.001
12 hr PO	4.18 ± 0.01	2.05 ± 0.02	0.002
18 hr PO	2.10 ± 0.02	1.00 ± 0.02	0.021
24 hr PO	1.33 ± 0.04	0.80 ± 0.02	0.004
P valueb,*	< 0.001	0.192	0.024c

Values are presented as mean ± standard deviation. Group A received bilateral 0.2 mL/kg bupivacaine (0.125%; maximum volume 4 mL/side). Group B received bilateral 0.2 mL/kg bupivacaine (0.125%) + 0.5 μg/kg dexmedetomidine (maximum volume 4 mL/side).

CHEOPS: children’s hospital of Eastern Ontario pain scale, PACU: post-anesthesia care unit, PO: postoperative.

^*P value < 0.05 was considered significant.

^aIndependent t-test for the mean difference between both groups.

^bTwo-way repeated measures ANOVA for data of the same group at different times.

^cTime*group interaction.