Table 1

MINORS criteria scores by study.

Criteria	Guzman et al23	Peng et al19	Tanishima et al18	Hwang et al24	Worley et al25	Langlois et al26	Khan et al20	Moazzeni et al22	Machino et al21
A clearly stated aim	2	2	2	2	2	2	2	2	2
Inclusion of consecutive patients	2	2	2	2	2	2	2	2	2
Prospective collection of data	2	2	2	2	2	2	2	2	2
Endpoints appropriate to the aim of the study	2	2	2	2	2	2	2	2	2
Unbiased assessment of the study endpoint	0	2	0	0	0	0	0	0	0
Follow-up period appropriate to the aim of the study	0	0	2	2	0	2	2	2	2
Loss to follow-up less than 5%	2	2	1	2	2	2	2	2	2
Prospective calculation of the study size	2	2	2	2	2	2	2	2	2
An adequate control group	0	0	1	0	0	0	1	2	2
Contemporary groups	0	0	2	0	0	0	1	2	2
Baseline equivalence of groups	0	0	2	0	0	0	1	2	2
Adequate statistical analyses	2	2	2	2	2	2	2	2	2
Total score	14	16	20	16	14	16	19	22	22

Abbreviation: MINORS, methodological items for nonrandomized studies.
Note: MINORS Score Criteria: scored 0 (not reported), 1 (reported but inadequate), or 2 (reported and adequate).23