Table 2.

Sensitivity analysis of symptom scores.

Excluded study	SMD	95% CI	P value	I2
2008 Liu[12] (CCT)	−0.57	−0.19, 0.05	< .0001	87%
2015 Xu[16]	−0.95	−1.85, −.05	< .00001	95%
2008 Peng[18]	−1.52	−2.64, −0.40	< .00001	96%
2011 Guo[17]	−1.92	−3.56, −0.27	< .00001	96%
2015 Zhang[15]	−1.92	−3.57, −0.27	< .00001	95%