Table 3.

Postoperative rescue analgesia and the number of PCA boluses

Variable	Group C (n = 71)	Group D (n = 72)	P values
Rescue analgesia
No	50 (70.4%)	66 (91.7%)*	0.001
Once	12 (16.9%)	4 (5.6%)*	0.036
Twice	9 (12.7%)	2 (2.7%)*	0.031
PCA bolus
Total	14.3 ± 3.3	10.5 ± 3.9*	< 0.001
Actual	11.8 ± 3.2	9.0 ± 3.5*	< 0.001
Ineffective	2.5 ± 1.6	1.5 ± 0.9*	< 0.001

Values are means ± SD or numbers (%)

*Statistically significant (P < 0.05)