Sensitivity analyses
Table S7 showed the results of sensitivity analysis. When the analysis was restricted to “low risk of bias” studies, for TA treatment, the overall pooled CPR results returned to no difference (before: OR=1.24, 95%CI: 1.15 to 1.33; after: OR=1.13, 95%CI: 0.98 to 1.31), but the LBR results were unchanged (before: OR=1.18, 95%CI: 0.86 to 1.60; after: OR=0.95, 95%CI: 0.80 to 1.13). The pooled CPR (before: OR=1.37, 95%CI: 1.21 to 1.56; after: OR=1.58, 95%CI: 1.13 to 2.19) and LBR (before: OR=1.74, 95%CI: 1.23 to 2.46; after: OR=1.62, 95%CI: 1.26 to 2.07) results remained stable for TEAS before and after sensitivity analysis. When restricting to studies which reported both CPR and LBR, no significant difference was found for the pooled CPR results (OR=1.14, 95%CI: 0.97 to 1.32).