Table 3.

Quality assessment of the non-randomized studies.

Reference	Study aims	Consecutive patient inclusion criteria	Prospective collection of data	Endpoint consistent with the study aim	Unbiased evaluation of endpoints	Follow-up period	Loss to follow-up less than 5%	Prospective calculation of the sample size	Total
Liu et al., 2022 (27)	2	2	2	2	0	2	2	0	12
Lenz et al., 2020 (28)	2	2	2	2	0	2	2	0	12
Dreyling et al., 2017 (29)	2	2	2	2	1	2	2	0	13
Dreyling et al., 2020 (23)	2	2	2	2	1	2	2	0	13
Patnaik et al., 2016 (30)	2	2	2	1	0	2	2	0	11
Morschhauser et al., 2020 (31)	2	2	2	1	0	2	2	0	11

0. not reported.

1. reported but inadequate.

2. reported and adequate.