Needle-Free Electroacupuncture for Postoperative Pain Management

Table 7

Means of patient-controlled analgesia demanded by subjects of 24 hours postoperatively (in times of requests).

Group	Means of patient-controlled analgesia demanded by subjects of 24 hours postoperatively
	POR	One–eight hours	Eight–sixteen hours	Sixteen–twenty four hours
1	15.08±11.34	49.54±34.61	22.08±14.03	12.92±6.06
2	30.83±28.98	55.75±36.76	13.08±10.18	8.75±6.44
3	13.00±4.95	29.75±13.21	12.25±9.20	10.17±10.43
4	5.90±4.32^∧∧	22.30±19.90^∧	11.80±12.41	7.50±5.37

^∧𝑃<.05; ^∧∧𝑃<.01.