Table 4.

Quality assessment of all the included cohort studies using the Joanna Briggs Institute Critical Appraisal Checklist for Cohort Studies

Study	Year of publication	Study design	Checklist
			Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Q9	Q10	Q11
Montoya-Salazar et al. [18]	2014	Prospective	?	+	+	-	-	+	+	+	+	N/A	+
Jung et al. [19]	2012	Prospective	+	+	+	+	N/A	+	+	+	+	N/A	+
Crespi et al. [20]	2010	Prospective	+	+	+	N/A	N/A	+	+	+	+	N/A	+
Crespi et al. [21]	2010	Prospective	+	+	+	N/A	N/A	+	+	+	+	N/A	+
Hita-Iglesias et al. [22]	2016	Prospective	+	+	+	N/A	N/A	+	+	+	+	N/A	+
Blus et al. [23]	2015	Prospective	?	+	+	-	-	+	+	+	+	N/A	+
Bell et al. [24]	2011	Retrospective	+	+	+	+	+	+	+	+	+	N/A	+
Fugazzotto [25]	2012	Retrospective	+	+	+	N/A	N/A	+	+	+	+	N/A	+
Zuffetti et al. [26]	2017	Retrospective	?	+	+	+	-	+	+	+	+	N/A	+

N/A = not applicable; ? = unclear; + = yes; - = no.