Table 5.

Multivariable logistic regression analyses of associations between predictive factors and surgical difficulty level.

	OR (95% CI)	P-value
Sex (M/F)	0.238 (0.049, 1.151)	0.074
BMI (kg/m2)	1.255 (1.042, 1.510)	0.017
Operation history	0.621 (0.175, 2.205)	0.462
Pelvic inlet	1.070 (1.014, 1.130)	0.014
Pelvic depth	1.031 (0.991, 1.073)	0.133
Transverse diameter	0.969 (0.908, 1.035)	0.346
Interspinous distance	1.026 (0.950, 1.109)	0.515
Intertuberous distance	0.943 (0.891, 0.997)	0.041

OR, odds ratio.

The bold values P-value <0.05.