Research Article

Safety and Efficacy of the Supine Position with the Right Shoulder Raised versus the Left Lateral Position in Peroral Endoscopic Myotomy for Achalasia: A Large-Sample Retrospective Study

Table 1

Clinical characteristics of the two groups.

Supine position with the right shoulder raised group ()Left lateral position group ()p value

Sex, male/female (n)249/33060/630.241
Age, mean (range) (years)45.7 (18–85)43.3 (19–77)0.088
Duration of symptoms, mean (range) (years)7.1 (0.1–45)5.4 (0.2–33)0.069
Previous treatment [n (%)]112 (19.3)34 (27.6)0.636
 Balloon dilation57 (9.8)20 (16.3)
 Botox injection33 (5.7)10 (8.1)
 Temporary stenting3 (0.5)2 (1.6)
 Heller myotomy8 (1.4)0 (0)
 Balloon dilation + Botox injection3 (0.5)0 (0)
 Balloon dilation + temporary stenting1 (0.2)0 (0)
 Botox injection + temporary stenting1 (0.2)0 (0)
 Temporary stenting + Heller myotomy1 (0.2)1 (0.8)
 Peroral endoscopic myotomy5 (0.9)1 (0.8)
Ling classification [n (%)]0.116
 I69 (11.9)23 (18.7)
 IIa157 (27.1)32 (26.0)
 IIb148 (25.6)32 (26.0)
 IIc180 (31.1)28 (22.8)
 IIIl8 (1.4)5 (4.1)
 IIIr7 (1.2)1 (0.8)
 IIIlr10 (1.7)2 (1.6)
Chicago subtype of achalasia [n (%)]0.877
 I113 (19.5)26 (21.1)
 II428 (73.9)90 (73.2)
 III38 (6.6)7 (5.7)