Table 6 Pre-post comparisons on the perceived disturbance of individual noise sources

Technical devices

 Mechanical ventilators

58

3

3

0.603

0.040 [0.003, 0.290]

48

3

3

0.425

0.102 [0.000, 0.370]

 Surveillance monitors (alarms)

62

4

3

1.000

0.038 [0.005, 0.310]

48

3

3

0.745

0.087 [0.004, 0.380]

 Dialysis machine

39

3

3

0.212

0.117 [0.008, 0.420]

35

3

3

0.086

0.277 [0.030, 0.570]

 Perfusors

58

3

3

0.400

0.087 [0.006, 0.320]

48

3

3

0.240

0.160 [0.009, 0.430]

 ECMO^f

20

2

2

0.530

0.158 [0.000, 0.520]

19

2

2

1.000

0.000 [N/A^g]

 Suction pump

50

2

3

0.150

0.184 [0.010, 0.450]

41

2

3

0.417

0.065 [0.008, 0.360]

 Visitor bell

58

3

3

0.964

0.052 [0.005, 0.320]

48

3

3

0.822

0.027 [0.005, 0.340]

 Telephones

59

3

3

0.697

0.012 [0.006, 0.310]

50

3

3

0.244

0.173 [0.007, 0.420]

 Beeper

52

2

2

0.736

0.035 [0.000, 0.310]

41

2

3

0.065

0.359 [0.060, 0.620]

 Heated blanket

34

2

2

0.884

0.044 [0.000, 0.400]

27

2

3

0.358

0.232 [0.010, 0.560]

 Compressed air

33

2

2

0.287

0.124 [0.010, 0.440]

35

2

2

0.018^e

0.403 [0.110, 0.670]

 Thoracic drainage

39

2

2

0.674

0.049 [0.000, 0.370]

33

2

2

0.830

0.011 [0.000, 0.380]

 Transport monitor / ventilator

51

2

2

0.985

0.021 [0.006, 0.310]

43

2

2

0.414

0.155 [0.008, 0.440]

Clinical activities or actions

 Using the brake on the bed

50

3

4

0.009^e

0.353 [0.110, 0.560]

40

3

4

0.082

0.310 [0.050, 0.570]

 Opening cartons or packages

56

3

3

0.327

0.054 [0.004, 0.310]

47

3

3

0.674

0.097 [0.006, 0.360]

 Opening or closing doors/drawers

62

2

3

0.386

0.115 [0.007, 0.360]

49

2

2

0.866

0.027 [0.002, 0.340]

 Visits

62

3

3

0.740

0.060 [0.002, 0.300]

50

3

3

0.386

0.099 [0.004, 0.370]

 Private conversations from colleagues

60

3

3

0.597

0.059 [0.002, 0.290]

48

3

3

1.000

0.022 [0.000, 0.310]

 Cleaning work

62

2

2

0.622

0.069 [0.006, 0.310]

49

2

2

0.106

0.211 [0.010, 0.470]

 Shoes (e.g. squeaking)

58

2

2

0.024^d

0.279 [0.060, 0.500]

48

2

2

0.217

0.211 [0.007, 0.480]

 Conversation of visitors

57

2

2

0.528

0.068 [0.004, 0.330]

47

2

2

0.829

0.035 [0.000, 0.340]