Table 3 Primary and secondary outcomes
Level of expertise | Medical students (n = 14) | Emergency physicians (n = 11) | p value |
|---|---|---|---|
Number of attemptsa | 2.5 [2.0–3.0] | 2.0 [1.0–2.9] | 0.140 |
Success at first attempt, number (%) | 3 (21) | 4 (37) | 0.409 |
Length of procedureb, min | 23.2 ± 6.2 | 15.3 ± 2.9 | 0.001 |
Stability of probeb, points | 0.5 ± 1.7 | 1.5 ± 0.8 | 0.215 |