Needle-Free Electroacupuncture for Postoperative Pain Management

Table 6

Dose of patient-controlled analgesia delivered (in mg).

Group	Means over the four time intervals for PCA doses delivered
	POR	One–eight hours	Eight–sixteen hours	Sixteen–twenty four hours
1	4.08±1.66	18.08±5.64	10.88±4.50	9.67±3.30
2	5.17±2.98	17.73±3.52	8.28±2.50	7.55±2.37
3	4.58±1.31	15.34±2.80	7.68±3.55	8.13±4.66
4	2.30±2.00^∧	14.22±3.55	8.30±3.67	6.77±3.43

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