Evidence analysis on the utilization of platelet-rich plasma as an adjuvant in the repair of rotator cuff tears

Table 4 AMSTAR scores and AMSTAR 2 grading for included studies

Sl. No	AMSTAR domains	Chahal (2012)	Moraes (2013)	Zhang (2013)	Li (2014)	Zhao (2015)	Warth (2015)	Vavken (2015)	Cai (2015)	Xiao (2016)	Hurley (2018)	Han (2019)	Wang (2019)	Chen (2019)	Cavendish (2020)	Hurley (2020)	Yang (2020)	Zhao (2021)	Ryan (2021)	Xu (2021)	Li (2021)
1	Was a priori design provided?	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
2	Were there duplicate study selection and data extraction?	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	1	1	1
3	Was a comprehensive literature search performed?	1	1	0	1	0	0	1	0	1	1	0	0	1	0	1	1	0	0	1	1
4	Was the status of publication (i.e. grey literature) used as an inclusion criterion?	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
5	Was a list of studies (included and excluded) provided?	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
6	Were the characteristics of the included studies provided?	1	1	1	1	1	1	0	1	1	1	1	1	1	1	1	1	1	1	1	1
7	Was the scientific quality of the included studies assessed and documented?	1	1	1	1	1	1	1	1	1	1	1	1	0	1	1	1	1	1	1	1
8	Was the scientific quality of the included studies used appropriately in formulating conclusions?	1	1	1	1	1	1	1	0	1	1	1	1	0	1	1	1	1	1	1	1
9	Were the methods used to combine the findings of studies appropriate?	1	1	1	1	1	1	1	0	1	1	1	1	1	1	1	1	1	1	1	1
10	Was the likelihood of publication bias assessed?	0	1	1	0	1	1	1	1	1	0	1	1	1	1	1	0	0	0	0	0
11	Was the conflict of interest stated?	1	1	1	1	1	1	0	1	0	1	1	1	1	1	1	1	1	1	1	1
	Total AMSTAR score	8	8	10	8	8	7	8	6	8	8	8	8	7	9	8	8	6	7	8	8
	Critical Methodological Flaw	3	3	1	3	2	2	3	5	2	3	2	3	4	1	3	3	4	4	3	2
	Non-Critical Flaw	1	1	1	1	1	3	1	1	2	1	1	1	1	1	1	1	2	1	1	1
	AMSTAR 2 Grade	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL	CL

AMSTAR: Assessing the Methodological Quality of Systematic Reviews; CL: Critically low.