Nomogram to predict gas-related complications during transoral endoscopic resection of upper gastrointestinal submucosal lesions

Table 1 Univariate and multivariate analyses of factors influencing gas-related complications

Variables	Univariate		Multivariate
	OR (95%CI)	P value	OR (95%CI)	P value
Sex	1.087 (0.512-2.310)	0.827
Age	1.009 (0.975-1.045)	0.598
Hypertension	0.267 (0.035-2.045)	0.203
Diabetes	8.306 (1.135-60.774)	0.037	11.043 (0.921-132.452)	0.058
Medical history	1.032 (0.476-2.236)	0.936
Histological type		0.019
Largest lesion diameter	3.120 (1.483-6.565)	0.003
Lesion origin layer	5.011 (1.855-13.534)	0.001	1.774 (0.583-5.394)	0.028
Resection method		< 0.001		< 0.001
Electrocoagulation	11.326 (3.025-42.403)		10.296 (2.714-39.059)
Full-thickness	24.615 (6.802-89.074)		23.167 (6.367-84.295)
Surgical duration	2.828 (1.823-4.387)	< 0.001	2.085 (1.290-3.370)	0.029

OR: Odds ratio; CI: Confidence interval; NI: Not included in multivariate analysis.