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

Table 1

Group (A): comparison between landmark and ultrasound (IJV) techniques according to our scoring system.

Score	Landmark IJV (n = 100)		Ultrasound IJV (n = 100)		χ^2
	No.	%	No.	%
4	20	20.0	82	82.0	76.911	<0.001
5	42	42.0	2	2.0	46.620	<0.001
6	16	16.0	8	8.0	3.030	0.082
7	9	9.0	5	5.0	1.229	0.268
8	4	4.0	3	3.0	0.148
9	2	2.0	0	0.0	2.020
10	6	6.0	0	0.0	6.186
11	1	1.0	0	0.0	1.005

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