Long head of biceps tendon transposition for massive and irreparable rotator cuff tears: A systematic review and meta-analysis

Table 1 Methodological Index for Nonrandomized Studies scores of the clinical studies

Ref.	Study type/LOE	A clearly stated aim	Inclusion of consecutive patients	Prospective collection of data	Endpoints appropriate to the aim of the study	Unbiased assessment of the study endpoint	Follow-up period appropriate to the aim of the study	Loss to follow up less than 5%	Prospective calculation of the study size	An adequate control group	Contemporary groups	Baseline equivalence of groups	Adequate statistical analyses	Score
Barth et al[37], 2020	III, retrospective control study	2	1	2	2	1	2	1	0	2	1	2	0	16
Kocaoglu et al[34], 2020	III, retrospective control study	2	2	2	2	2	2	2	0	2	2	2	0	20
Rhee et al[33], 2021	III, retrospective control study	2	1	1	2	2	2	1	1	2	2	2	1	19
Chiang et al[36], 2021	III, retrospective control study	2	1	2	2	1	2	1	0	1	1	2	0	15
Kawashima et al[35], 2022	III, retrospective control study	2	1	2	2	1	2	1	0	1	2	2	0	16