Table 3 Comparison of differences in AR-US and S-US groups for CVC placement

Puncture attempt number (N)

Median (Q1-Q3)

Median (Q1-Q3)

 All (47)

1(1–2)

1(1–2)

0.43

 UGY (22)

1(1–3)

1(1–2)

0.28

 PGY (25)

1(1–2)

1(1–2)

0.94

 Male (32)

2(1–3)

1(1–2)

0.07

 Female (15)

1(1–1)

1(1–3)

0.24

Frequency of visual focus shift from US display to simulator (N)

Median (Q1-Q3)

Median (Q1-Q3)

 All (47)

1 (0–2)

5 (4–7)

 < 0.01^*

 UGY (22)

1 (0–1)

5 (4–7)

 < 0.01^*

 PGY (25)

1 (0–2)

5 (3–7)

 < 0.01^*

 Male (32)

0 (0–1)

5 (4–11.5)

 < 0.01^*

 Female (15)

1 (0–3)

5 (3–6)

 < 0.01^*

First pass rate (%)

N (%)

N (%)

 All (47)

35 (74.47)

31 (65.96)

0.50^†

 UGY (22)

15 (68.18)

17 (77.27)

0.74^†

 PGY (25)

20 (80)

14 (56)

0.13^†

 Male (32)

25 (78.13)

22 (68.75)

0.57^†

 Female (15)

10 (66.67)

9 (60)

1^†