Endoscopic ultrasound-measured muscular thickness of the lower esophageal sphincter and long-term prognosis after peroral endoscopic myotomy for achalasia

Table 1 Comparison of characteristics between patients with non-thickened and thickened lower esophageal muscularis propria

	Thickness of LEMP		P value
	< 3 mm (n = 19)	≥ 3 mm (n = 63)
Age (yr)	40.4 ± 15.2	48.4 ± 14.4	0.04
Sex (male/female)	6:13	26:37	0.448
Disease duration (mo)	37.79 ± 35.52	126.63 ± 138.49	< 0.001
History of endoscopic surgery (+/-)	1:18	5:58	0.619
Dilation grade (I/II/III)	6:4:1 (11)	15:20:7 (42)	0.667
Preoperative Eckardt score	6.53 ± 2.04	6.68 ± 1.90	0.758

LEMP: Lower esophageal muscularis propria.