Table 2.

Difference in primary and secondary results in the EA in combination with UC group and UC alone group between each evaluation and baseline

Variables	Group		P values*
	EA+UC (n=18)	UC alone (n=21)
	Mean±SD	Mean±SD
	Mean (95% CI)	Mean (95% CI)
VAS (mm)
Baseline	64.61±14.92	67.33±10.33
After 4 weeks	51.78±20.62	60.24±19.25
Difference	−12.83 (−25.27 to 0.39)	−7.10 (−13.22 to –0.97)	0.3919
After 8 weeks	41.50±24.75	58.24±20.83
Difference	−23.11 (-36.60 to 9.62)	−9.10 (−16.71 to –1.48)	0.0675
After 12 weeks	41.78±24.62	53.00±21.39
Difference	−22.83 (−35.86 to 9.81)	−14.33 (−23.29 to –5.38)	0.2553
Responder (%(n))
After 4 weeks	22.2 (4)	4.8 (1)	0.1618†
After 8 weeks	33.3 (6)	9.5 (2)	0.1123†
After 12 weeks	38.9 (7)	19.1 (4)	0.1698‡
ODI (%point)
Baseline	44.70±15.42	38.23±14.5
After 4 weeks	33.78±17.45	34.19±17.09
Difference	−10.93 (−15.92 to 5.94)	−4.04 (−7.59 to –0.5)	0.021
After 8 weeks	31.95±18.57	32.47±16.04
Difference	−12.75 (−17.23 to 8.28)	−5.77 (−8.75 to –2.79)	0.0081
After 12 weeks	29.67±18.46	28.60±16.69
Difference	−15.04 (−20.16 to 9.91)	−9.63 (−14.39 to –4.87)	0.1137
EQ-5D (point)
Baseline	0.65±0.13	0.66±0.15
After 4 weeks	0.71±0.11	0.72±0.14
Difference	0.06 (0.01 to 0.12)	0.05 (0.02 to 0.09)	0.7698
After 8 weeks	0.74±0.15	0.73±0.13
Difference	0.09 (0.02 to 0.16)	0.06 (0.02 to 0.11)	0.5151
After 12 weeks	0.73±0.17	0.74±0.13
Difference	0.08 (0 to 0.17)	0.08 (0.04 to 0.12)	0.9441

*t-test for comparison of difference between groups.

†Fisher’s exact test for comparison of difference between groups.

‡χ² test for comparison of difference between groups.

EA, electroacupuncture; EQ-5D, EuroQol Five Dimensions Questionnaire; ODI, Oswestry Disability Index; UC, usual care; VAS, Visual Analogue Scale.