The usage of drainage after primary total hip or knee arthroplasty: best evidence selection and risk of bias considerations

Table 3 Methodological Characteristics of Included Systematic Reviews

Authors	Primary Study design	Level of evidence	Software	Sensitivity analysis	Subgroup analysis	GRADE evidence profiles
Parker et al. 2001	Prospective trials	II/III	NM	No	Yes	No
Parker et al. 2004	RCT and qRCT	II	NM	No	Yes	No
Parker et al. 2007	Prospective trials	II/III	NM	No	Yes	No
Zhang et al. 2011	RCT and qRCT	II	Revman	Yes	No	No
Zhou et al. 2013	RCT	II	Revman and Stata	Yes	No	No
Chen et al. 2014	RCT and qRCT	II	Revman	Yes	No	Yes
Kelly et al. 2014	RCT and qRCT	II	Revman	No	No	No
Li et al. 2015	RCT	II	Revman	No	No	No
Quinn et al. 2015	RCT	II	Revman	No	No	No
Si et al. 2016	RCT	II	Revman	No	Yes	No
Zan et al. 2016	RCT	II	Revman	Yes	Yes	No
Zhang et al. 2018	RCT	II	Stata	No	Yes	No

NM not mentioned, RCT randomized controlled trials, qRCT quasi-randomized controlled trials

ISSN: 1471-2474