Application of pocket-first technique for implantation of totally implantable venous access ports

BMC Surgery

Table 3 Predicting factors of TIVAP operation time

Univariate analysis			Correlation analysis			Multivariate analysis
	R²	ANOVA P		Pearson’s correlation	P		R²	P
First procedure	0.099	<0.001	First procedure vs. BMI	0.064	0.179	total	0.111	<0.001
Sex	0.00049	0.642	First procedure vs. Vein	0.704	<0.001	First procedure		<0.001
Age	0.0038	0.194	BMI vs. Vein	0.009	0.867	BMI		0.014
Height	0.000043	0.89	First procedure vs. Ultrasonic guidance	0.912	<0.001
Weight	0.0055	0.117
BMI	0.0082	0.056
Diagnosis	0.00045	0.653	Vein vs. Ultrasonic guidance	0.786	<0.001
Port location	0.000059	0.872
Vein	0.179	<0.001
Ultrasonic guidance	0.102	<0.001	BMI vs. Ultrasonic guidance	0.050	0.292

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