Modified natural orifice specimen extraction type IV surgery for rectosigmoid cancer: A retrospective clinical study

Table 6 Multivariable linear regression analysis results of factors associated with operative time

Variables	Unstandardized β (95%CI)	Standardized β	P value
Gender	5.0 (-35.3 to 45.4)	0.041	0.803
Age (years)	0.4 (-1.1 to 1.9)	0.088	0.582
BMI (kg/m²)	1.6 (-6.0 to 9.3)	0.076	0.670
Distance from the anus (cm)	2.5 (-1.0 to 5.9)	0.222	0.156
Modified surgical approach	-49.9 (-90.8 to -9.0)	-0.415	0.019a
Intraoperative blood loss (mL)	-0.6 (-1.5 to 0.2)	-0.256	0.129
Tumor size (cm)	17.5 (-1.1 to 36.2)	0.295	0.067

^aP < 0.05.

Model summary: r = 0.582, R² = 0.339, adjusted R² = 0.194, Durbin-Watson = 1.568. BMI: Body mass index; CI: Confidence interval.