Double layered self-expanding metal stents for malignant esophageal obstruction, especially across the gastroesophageal junction

Table 1 Patient baseline characteristics (n = 48) n (%)

	Overall(n = 48)	GEJ obstruction(n = 18)	Non-GEJ obstruction(n = 30)	P value
Age (yr, mean ± SD)	68.4 ± 10.5	65.8 ± 10.3	69 ± 10.5	0.749
Male	39 (81.3)	12 (25.0)	27 (56.2)	0.045
Histological diagnosis
Squamous cell carcinoma	32 (66.6)	2	30	0.001
Adenocarcinoma	16 (33.4)	16	0	0.001
Type of treatment before SEMS placement
Supportive care	29 (60.4)	10	19	0.594
Chemotherapy	11 (22.9)	7	4	0.041
Radiation therapy	7 (14.6)	1	6	0.170
Chemoradiation therapy	1 (2.1)	0	1	0.434

GEJ obstruction, distal esophageal and gastroesophageal junction obstruction; Non-GEJ obstruction, middle and upper esophageal obstruction. GEJ: Gastroesophageal junction; SEMS: Self-expanding metal stents.