Safety and Effectiveness of Coronary Angiography or Intervention through the Distal Radial Access: A Meta-Analysis

Table 2

Internal validity of the included RCTs.

Study	A	B	C	D	E	F	G	H	I	J	K	Total
Lin et al.	1	0.5	1	1	1	1	1	1	0	1	0	8.5
Sharma et al.	0.5	0	1	1	1	1	1	1	0	1	0	7.5
Koledinskiy et al.	0.5	0	1	1	1	1	1	1	0	1	0	7.5
Vefalı et al.	0.5	0	1	1	1	1	1	1	0	1	0	7.5
Eid et al.	1	1	1	1	1	1	1	1	1	1	1	11
Lucreziotti et al.	0.5	0	1	1	1	1	1	1	0	1	0	7.5

RCT, randomized controlled trial. The internal validity of the included RCTs was assessed by 11 Cochrane Back Review Group criteria: A, the method of randomization was adequate; B, the treatment allocation was concealed; C, the groups were similar in the most important prognostic indicators at baseline; D, the patients were blinded to the intervention; E, the caregivers were blinded to the intervention; F, the outcome assessors were blinded to the intervention; G, cointerventions were controlled; H, compliance was acceptable in all groups; I, the dropout rate was described and acceptable; J, the timing of assessment in all groups was the same; K, ITT analysis was performed. A score of ≥6 indicates a high-quality study.