Table 1 Demographic characteristics of respondents for each of the four healthcare systems included in our study

Number of respondents

24,869

5,078

21,272

22,222

Average age in years (standard deviation)

49.21 (8.77)

47.53 (9.61)

47.74 (9.63)

49.05 (9.14)

Female (percentage)

73

76

75

74

Professional family (percentage)

 Medical doctors

15

13

13

16

 Nurses

38

41

43

44

 Nursing assistants

15

16

15

12

 Technicians

12

14

15

13

 Administrative staff

16

11

12

9

 N/A

4

5

2

6