Central Venous Catheter Insertion: A Scoring System for Evaluation of Both the Procedure and the Operator (CVCI Score/Gaber Score)

Table 6

Comparison between landmark and ultrasound in SV group (B) according to the number of attempts and time of cannulation.

	Landmark SV (n = 100)	Ultrasound SV (n = 100)	Z
Number of attempts
Min–Max	1.0–6.0	1.0–3.0	0.871	0.384
Mean ± SD	1.46 ± 0.99	1.27 ± 0.55
Median	1.0	1.0
Time of cannulation
Min–Max	110.0–450.0	150.0–400.0	7.783	<0.001
Mean ± SD	150.39 ± 73.28	200.49 ± 68.35
Median	118.0	180.50

FE: Fisher Exact for Chi square test. ^∗: Statistically significant at p ≤ 0.05.