Acupuncture at the P6 Acupoint to Prevent Postoperative Pain after Craniotomy: A Randomized, Placebo-Controlled Study

Table 3

Postoperative analgesic drug (tramadol) use over time.

	Acupuncture group (N = 58)	Sham acupuncture group (N = 59)	values
The use of tramadol 0–24 h after operation			0.977
No (%)	53 (91.4)	54 (91.5)
Yes (%)	5 (8.6)	5 (8.5)
The use of tramadol 24–48 h after operation			0.623
No (%)	57 (98.3)	56 (94.9)
Yes (%)	1 (1.7)	3 (5.1)
The use of tramadol 48–72 h after operation			1.000
No (%)	58 (100)	58 (98.3)
Yes (%)	0 (0)	1 (1.7)