Fig. 2
From: Acupuncture for pain control after degenerative lumbar spine surgery
Daily changes of VAS pain scores in the first 6 days after surgery (Data presented as median and statistical analysis by ANOVA.) At postoperative day 4, the VAS scores were significantly higher in the PCA group than in the NA and AC groups (p = 0.026). By day 6, the VAS scores in the AC group were significantly lower than in the other 2 groups (p = 0.047)