Table 1.

MINORS rating scale: ①A clearly stated aim;②Inclusion of consecutive patients; ③Prospective collection of data;④ Endpoints appropriate to the aim of the study;⑤Unbiased assessment of the study endpoint;⑥Follow-up period appropriate to the aim of the study;⑦Loss to follow up less than 5%;⑧ Prospective calculation of the study size.⑨Appropriate selection of control group;⑩Synchronization of control group; ⑪Baseline comparable between groups ⑫Appropriately statistical analysis. The global ideal score being 24 for comparative studies.

Study	①	②	③	④	⑤	⑥	⑦	⑧	⑨	⑩	⑪	⑫	Score
Guan WJ	2	2	2	2	2	0	0	0	2	2	2	2	18
Huang C	2	2	2	2	2	1	2	0	2	2	2	2	21
Mo P	2	2	2	2	2	0	2	0	2	2	2	2	20
Peng YD	2	2	2	2	2	0	1	0	2	2	2	2	19
Shi Y	2	2	2	2	2	1	2	0	2	2	2	2	21
Tang N	2	2	2	2	2	1	0	0	2	2	2	2	19
Tian S	2	2	2	2	2	0	1	0	2	2	2	2	19
Wang D	2	2	2	2	2	1	2	0	2	2	2	2	21
Wang Z	2	2	2	2	2	1	2	0	2	2	2	2	21
Wu C	2	2	2	2	2	1	0	0	2	2	2	2	19
Yang X	2	2	2	2	2	0	1	0	2	2	2	2	19
Yuan ML	2	2	2	2	2	1	2	0	2	2	2	2	21
Zhou F	2	2	2	2	2	1	2	0	2	2	2	2	18