Cemented versus uncemented stems for revision total hip replacement: A systematic review and meta-analysis

Table 1 Newcastle-Ottawa Scale for assessing the quality of observational studies

Ref.	Selection				Comparability	Exposure			Total
	Representativeness of the exposed cohort	Selection of the non-exposed cohort	Ascertainment of exposure	Demonstration that outcome of interest was not present at start of study	Comparability of cohorts on the basis of the design or analysis	Assessment of outcome	Was follow-up long enough for outcomes to occur	Adequacy of follow up of cohorts	Total number of stars
Tyson et al[39], 2021	*	*	*	*	**	*	*	*	9
Weiss et al[38], 2011	*	*	*	*	*	*	*	*	8
Iorio et al[6], 2008	*	*	-	*	*	*	*	*	7