Summary of the characteristics of the included trials and the assessment of methodology.

Notes: T: Trial Group, C: Control Group, +: mean same as the control group treatment; TER: Total efficacy rate, NCV: Nerve conduction velocity; n.r.: not report; No: no adverse event was identified; Chen2011a: CHM compared with mecobalamin; Chen2011b: CHM compared with placebo.

备注：T：试验组（Trial Group），C：对照组（Control Group）；加号（+）表示治疗效果均值与对照组一致；TER：总有效率（Total efficacy rate），NCV：神经传导速度（Nerve conduction velocity）；n.r.：未报告；No：未发现不良事件；Chen2011a：中草药（CHM）与甲钴胺（mecobalamin）对比；Chen2011b：CHM与安慰剂（placebo）对比。