Table 3 Details of the scores (mean ± standard deviation) obtained at the different steps of the performance assessment scale for the SIM+ and SIM− groups

Antiseptic procedure (3)

2.61 ± 0.65

2.36 ± 0.66

0.11

Location of incision site (1)

0.94 ± 0.23

0.69 ± 0.47

0.005

Local anesthesia (1)

0.88 ± 0.33

0.85 ± 0.37

0.61

Incision and dissection (6)

4.41 ± 0.70

2.43 ± 1.31

<0.001

Confirmation of location (2)

1.62 ± 0.69

0.98 ± 0.91

0.001

Introduction of chest tube with a Kelly clamp (4)

3.28 ± 1.03

2.46 ± 1.09

0.002

Securing water seal tubing (1)

0.81 ± 0.38

0.23 ± 0.42

<0.001

Securing chest tube (2)

1.74 ± 0.44

1.39 ± 0.61

0.01

Total (20)

16.29 ± 1.82

11.39 ± 3.67

<0.001