Table 1.

The participants' demographic data and past experience with ultrasound and performing CVC placement (n = 23).

Variable	Number (% [95% CI])
Gender
Female	10
Male	13
PG training
1	4
2	6
3	2
>=4	5
Nonspecified	6
Year(s) in practice
<=5 years	16
>5 years	7
Specialty
Internal medicine	6
Critical care	5
Anesthesia	5
Surgery/surgical subspecialties	4
Emergency medicine	2
Others	1
Number of CVCs placed
>20	12 (52%  [30–73])
1–20	8 (35%  [15–54])
None	3 (13%  [0–26])
Prior ultrasound training	6
Prior use of ultrasound for CVC placement	None