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Annals of Intensive Care

Table 5 Logistic regression between dependent variable and sound levels (dBC)

From: Sound level intensity severely disrupts sleep in ventilated ICU patients throughout a 24-h period: a preliminary 24-h study of sleep stages and associated sound levels

Dependant variable

Coefficient

SD

Wald statistics test

OR (95% CI)

Likelihood ratio test

Waking

0.049

0.009

1965***

1.05 (1.04–1.05)

206***

Arousal

0.018

0.004

15.4***

1.02 (1.01–1.03)

15.0***

Transitions

−0.028

0.004

58.8***

0.97 (0.96–0.98)

61.6***

 N3 to W

0.052

0.031

1.7

1.05 (0.99–1.12)

2.7

 N2 to W

0.048

0.009

27.6***

1.05 (1.03–1.07)

26.2***

 N1 to W

−0.014

0.02

0.6

0.99 (0.95–1.02)

0.6

 REM to W

0.066

0.05

1.8

1.07 (0.98–1.17)

1.6

  1. OR (95% CI) odds ratio and 95% confidence interval
  2. *** p < 0.001
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