Table S2.

Sensitivity analyses on pain changes after treatment

Real acupuncture vs sham acupuncture	Effect size	Heterogeneity
All studies	MD =−1.04, 95% CI (−1.70, −0.38)	I2=78%
All studies except Ugurlu et al, 201738	MD =−0.83, 95% CI (−1.47, −0.19)	I2=72%
All studies except Stival et al, 201439	MD =−0.90, 95% CI (−1.57, −0.22)	I2=78%
All studies except Assefi et al, 201440	MD =−1.21, 95% CI (−1.89, −0.53)	I2=77%
All studies except Harris et al, 200537	MD =−1.15, 95% CI (−1.84, −0.46)	I2=80%
The studies with low risk of bias	MD =−0.65, 95% CI (−1.30, −0.01)	I2=71%