Perforator-based flaps for the treatment of burn scar contractures: a review

Table 2 Quality assessment using the New Castle-Ottowa scale

Study	Year	Study type	Selection				Comparability	Outcome
Study	Year	Study type	Representativeness of the exposed cohort	Selection of the non-exprosed cohort	Ascertainment of exposure	Outcome of interest not present at start	Comparability of the cohorts	Assessment of outcome	Follow-up long enough	Adequacy of follow-up of cohorts
Ogawa [11]	2004	Cohort—retrospective	*						*
Er [9]	2005	Cohort—pre-postoperative design	*			*
Tsai [17]	2006	Cohort—pre-postoperative design	*		*	*		*	*
Ogawa [16]	2006	Cohort—retrospective	*						*
Rashid [12]	2006	Cohort—pre-postoperative design	*			*			*	*
Waterson [18]	2008	Cohort—retrospective	*						*
Verhaegen [14]	2011	Cohort—pre-postoperative design	*		*	*		*	*
Tucker [13]	2011	Cohort—retrospective	*
Wang [15]	2014	Cohort—pre-postoperative design	*					*	*	*
Li [10]	2015	Cohort—retrospective	*			*		*	*	*
Stekelenburg [8]	2017	RCT	*	*	*	*	*	*	*	*

A star (*) indicates that a measure was adequately addressed in this study. A study could be awarded a maximum of one star for each numbered item within the Selection and Exposure categories. A maximum of two stars could be given for Comparability.