A randomized controlled trial of ultrasound-assisted technique versus conventional puncture method for saphenous venous cannulations in children with congenital heart disease

Table 6 Results of the multivariate logistic regression model to examine factors associated with the success rate of the first attempt (N = 144)

Variables	β	OR(95% CI)	P-value
Puncture method			0.152
Ultrasound-assisted	0.683	1.979 (0.778, 5.034)
Conventional puncture	Reference	Reference
Age	0.132	1.141(1.010, 1.290)	0.034
Venous grading			0.582
I-II	0.346	1.414 (0.412, 4.853)
III	Reference	Reference
Needle redirections at the first attempt	−0.359	0.698 (0.528, 0.923)	0.012
The time to cannulation at the first attempt	−0.013	0.987 (0.962, 1.012)	0.301
The width of the saphenous veins	0.167	1.181 (1.023, 1.364)	0.023
Constant	−1.913	0.148	0.130

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