Yanyu Decoction for Aged Patients with Stable Coronary Artery Disease: A Systematic Review and Meta-Analysis

Table 2

Methodologic quality of the included trials based on the Cochrane handbook.

References	A	B	C	D	E	F	G
Chen et al. [15]	−	?	?	?	+	+	+
Chen [16]	?	?	?	?	+	+	+
Liu [5]	+	?	?	?	+	+	+
Liu [18]	−	?	?	?	+	+	+
Wang and Yang [19]	+	?	?	?	+	+	+

A = Random sequence generation (selection bias); B = Allocation concealment (selection bias); C = Blinding of participants and personnel (performance bias); D = Blinding of outcome assessment (detection bias); E = Incomplete outcome data (attrition bias); F = Selective reporting (reporting bias); G = Other bias; +, low risk; −, high risk; ?, unclear.