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

Table 2 Comparison of characteristics in patients with different outcomes after peroral endoscopic myotomy

	Not effective (n = 5)	Clinical success/effective (n = 55)		P value
		No relapse (n = 48)	Relapse (n = 7)
Age (yr)	33.8 ± 11.97	48.02 ± 14.73	34.00 ± 13.05	0.021a
Sex (male/female)	3:2	16:32	4:3	0.280
Disease duration (mo)	82.8 ± 60.36	117.29 ± 131.41	35.57 ± 30.42	0.001a
Preoperative Eckardt score	6.60 ± 2.40	6.65 ± 1.74	7.57 ± 2.23	0.209a
Verification of myotomy by EUS (Yes/No)1	3:2	39:11	6:1	0.539
LEMP (thickened/ non-thickened)	4:1	39:9	5:2	0.832

¹Based on procedure number.

^aP < 0.05, between relapse and no relapse. LEMP: Lower esophageal muscularis propria; POEM: Peroral endoscopic myotomy; EUS: Endoscopic ultrasound.