Association of neutrophil-lymphocyte ratio with all-cause and cardiovascular mortality in peritoneal dialysis patients: A systematic review and meta-analysis

Table 1 Risk of bias assessment using the Joanna Briggs Institute tool

Criteria	An et al[19]	Liu et al[18]	Zeng et al[17]	Zhang et al[16]	Xu et al[15]	Lau et al[14]	Liu[13]
Similar groups from the same population	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Exposures measured similarly	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Exposure is measured validly and reliably	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Confounding factors identified	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Strategies to deal with confounding factors	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Groups are free of outcome at the start	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Outcomes are measured validly and reliably	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Follow-up time reported and sufficient	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Follow up complete or reason for loss described	Yes	Yes	Yes	Yes	Yes	Yes	Unclear
Strategies to address incomplete follow-up	Yes	Yes	Yes	Yes	Yes	Yes	Unclear
Appropriate statistical analysis	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Overall appraisal	Include	Include	Include	Include	Include	Include	Include