Efficacy and Safety of Acupuncture for Acute Low Back Pain in Emergency Department: A Pilot Cohort Study

Table 3

Changes in VAS between control group and acupuncture group.

	Control ()			Acupuncture ()			value
	Median			Median
ΔVAS2-VAS1	0.0	0	0	−2.0	−4	−1	<0.001^∗
ΔVAS3-VAS1	−1.5	−3	0	−4.0	−5	−1	0.370
ΔVAS3-VAS2	−1.5	−3	0	−1.0	−3	2	0.181

value by Mann-Whitney test.
: Percentile 25.
: Percentile 75.
Statistically significant difference ().
ΔVAS2-VAS1, changes of VAS-2 and VAS-1; ΔVAS3-VAS1, changes of VAS-3 and VAS-1; ΔVAS3-VAS2, changes of VAS-3 and VAS-2.