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Table 3 Results from the sleep evaluation per site and of all sites; average scores per item of the Richards Campbell sleep questionnaire (RSCQ) and the average overall RCSQ score are expressed as mean mm (SD)

From: Noise in the intensive care unit and its influence on sleep quality: a multicenter observational study in Dutch intensive care units

Site number

Sleep depth

Falling asleep

Awakening

Return to sleep

Sleep quality

Average RCSQ score

1

50 (26)

67 (31)

59 (26)

52 (30)

59 (27)

57 (23)

2

64 (24)

54 (33)

66 (30)

56 (26)

69 (26)

62 (26)

3

52 (26)

44 (29)

50 (25)

48 (34)

46 (31)

48 (23)

4

46 (16)

56 (24)

49 (24)

50 (27)

51 (28)

50 (20)

5

61 (28)

64 (31)

65 (26)

59 (32)

60 (30)

62 (27)

6

60 (16)

67 (22)

61 (21)

56 (22)

65 (22)

62 (18)

All sites

54 (25)

60 (30)

58 (26)

53 (30)

57 (29)

56 (24)