Efficacy of pelvic floor peritoneal reconstruction after laparoscopic resection of middle and low rectal cancer: A meta-analysis

Table 2 Quality evaluation of all the included studies

Ref.	Study design	NOS score (0-9)	Quality rating
Yan et al[1]	Retrospective cohort	6	Moderate
Shen et al[2]	Retrospective cohort	6	Moderate
Li et al[3]	Retrospective PSM cohort	7	High
Wang et al[4]	Retrospective cohort	6	Moderate
Ji et al[5]	Prospective cohort	7	High
Han et al[6]	Retrospective cohort	6	Moderate
Gao et al[7]	Retrospective PSM cohort	6	Moderate
Hultman et al[8]	Retrospective cohort	5	Moderate
Li et al[9]	Retrospective cohort	5	Moderate
Shen et al[10]	Retrospective cohort	7	High
Fu et al[11]	Retrospective cohort	7	High

PSM: Propensity score matching; NOS: Newcastle-Ottawa Scale. Scores of 7-9 were rated as high quality and 4-6 as moderate quality.