Construction of a nomogram model to predict technical difficulty in performing laparoscopic sphincter-preserving radical resection for rectal cancer

Table 8 Multivariable logistic regression analysis of surgical difficulty in 162 cases of laparoscopic radical sphincter-preserving surgery for rectal cancer

Variable	β	SE	Wald	Odds ratio (95%CI)	P value
Intercept	1.945	6.353	0.094	6.99 (0.000-1787454.283)	0.760
Tumor Height	0.230	0.196	1.387	1.259 (0.858-1.848)	0.239
Surgical approach (Control group = L-ISR)
L-AR	-5.050	2.425	4.336	0.006 (0.000-0.743)	0.037
L-LAR	-3.417	1.311	6.789	0.033 (0.003-0.429)	0.009
Intraoperative preventive ostomy	2.604	0.861	9.147	13.517 (2.500-73.069)	0.002
Sacrococcygeal distance	0.086	0.04	4.567	1.09 (1.007-1.180)	0.033
Sacrococcygeal-pubic angle	-0.115	0.082	1.959	0.891 (0.759-1.047)	0.162
Anterior-posterior diameter of pelvic inlet/sacrococcygeal distance	-9.328	4.151	5.050	0.00009 (0.000-0.304)	0.025

L-AR: Laparoscopic anterior resection; L-LAR: Laparoscopic low or ultralow anterior resection; L-ISR: Laparoscopic intersphincteric resection.