Table 3.

Logistic regression analysis of intraoperative perforation.

Risk factors	Univariate analysis	Multivariable analysis
	OR (95% CI) p value	OR (95% CI) p value
surgical approach	1.911 (0.969-3.769) 0.062
Sex	0.725 (0.360-1.461) 0.369
Age	0.768 (0.393-1.501) 0.440
Hypertension or diabetes	0.714 (0.369-1.382) 0.317
Hb	1.013 (0.991-1.036) 0.235	1.012 (0.99-1.035)	0.282
BMI	0.967 (0.869-1.075) 0.535	0.936 (0.833-1.052)	0.269
Operationtime (min)	1.015 (1.004-1.026) 0.007	1.015 (1.004-1.026)	0.007