Preemptive Analgesia in Total Knee Arthroplasty: Comparing the Effects of Single Dose Combining Celecoxib with Pregabalin and Repetition Dose Combining Celecoxib with Pregabalin: Double-Blind Controlled Clinical Trial

Table 2

Total morphine consumption (PCA) among the groups after undergoing TKA procedure.

	Group 1 (1 hr preemptive analgesia)	Group 2 (72 hrs preemptive analgesia)	Group 3 (Placebo)	P value
	N=10	N=10	N=10
Morphine (PCA)	10.60(2.675)	9.90(1.524)	30.20(5.308)	<0.001

The data were normally distributed.
The p value was measured using ANOVA parametric test.