Gender and birth weight as risk factors for anastomotic stricture after esophageal atresia repair: a systematic review and meta-analysis

Table 3 Assessment of the included studies using the Newcastle-Ottawa scale

Study	Selection				Comparability	Outcome				Score
	Representativeness of the exposed cohort	Selection of the non-exposed cohort	Ascertainment of exposure	Demonstration that the outcome of interest was not present at the start of the study	Comparability of cohorts on the basis of the design or analysis	Outcome	Assessment of outcome	Follow-up long enough for outcomes to occur	Adequacy of follow-up of cohorts
Michaud et al. (2001) [14]	+	+	+	+	–	Stricture	+	+	–	6
Allin et al. (2014) [15]	+	+	+	+	–	Stricture	+	+	+	7
Nice et al. (2016) [16]	+	+	+	+	–	Stricture	+	+	–	6
Okata et al. (2016) [7]	+	+	+	+	+	Stricture	+	+	+	8
Stenström et al. (2017) [17]	+	+	+	+	+	Stricture	+	+	+	8
Donoso et al. (2017) [8]	+	+	+	+	++	Stricture	+	+	–	8

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