Double-layered covered stent for the treatment of malignant oesophageal obstructions: Systematic review and meta-analysis

Table 2 Event counts of tumour overgrowth, stent migration and complications encountered

Publication	Tumour overgrowth	Stent migration	Food impaction	Reflux esophagitis	Aspiration pneumonia	Esophageal fistula	Perforation	Hemorrhage
Verschuur et al[16], 2006	n = 2	n = 3	-	n = 2	n = 2	-	n = 1	n = 1
Kim et al[13], 2009	-	-	n = 1	-	-	n = 1	-	-
Park et al[15], 2010	n = 5	n = 1	-	n = 4	n = 1	n = 1	-	-
Battersby et al[12], 2012	n = 1	n = 3	6%	8%	3%	0.8%	0.4%	-
Kim et al[14], 2012	n = 13	n = 1	n = 2	n = 13	n = 5	n = 2	-	-
Mezes et al[11], 2014	n = 19	n = 4	-	-	-	n = 1	-	-