Effect of polyglycolic acid sheet plus esophageal stent placement in preventing esophageal stricture after endoscopic submucosal dissection in patients with early-stage esophageal cancer: A randomized, controlled trial

Table 3 Comparison of tumor lesion features in patients with esophageal stricture n (%)

Parameter	PGA + stent group (n = 7)	Stent group (n = 15)	P value
Location			0.899
Upper third	0 (0)	0 (0)
Middle third	4 (57)	9 (60)
Lower third	3 (43)	6 (40)
Tissue depth			0.823
M1	2 (29)	5 (33)
M2	5 (71)	10 (67)
Longitudinal length (cm)	7.71 + 3.50	6.60 + 2.10	0.360
Circumferential range			0.181
3/4	0 (0)	4 (27)
4/5	1 (14)	4 (27)
1/1	6 (86)	7 (47)

Data are presented as mean ± SD or count (percentage). Comparison was determined by t-test or Chi-square test. P < 0.05 was considered significant. PGA: Polyglycolic acid.