Table 4 Linear regression with one major question as a dependent variable at time point t2

Work experience

0.00 (0.02)

−0.03 – 0.03

0.859

I use the ABCDE-structure in prehospital trauma care

0.09 (0.04)

0.01–0.18

0.036

I feel safe in thoracic needle decompression

0.10 (0.03)

0.05–0.15

<0.001

I feel safe in proper handling with neck collars

0.43 (0.05)

0.33–0.53

<0.001

After one year, my expectations have been fulfilled

0.05 (0.05)

−0.04 – 0.15

0.275

I am anxious regularly to do further studies by medical journals.

0.03 (0.04)

−0.04 – 0.10

0.404

Sex

−0.07 (0.09)

−0.25 – 0.10

0.400