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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