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. Author manuscript; available in PMC: 2014 Dec 1.
Published in final edited form as: J Crit Care. 2013 Oct 17;28(6):1093–1098. doi: 10.1016/j.jcrc.2013.08.022

Table 3.

Single and Multiscale Entropy Measures

Measures LSI Non-LSI p value
Single Scale
  SampEn (r=20%) 0.90 ± 0.42 1.19 ± 0.35 0.035
  SampEn (r=6 ms) 0.58 ± 0.56 1.17 ± 0.59 0.003
  QSampEn 8.73 ± 3.40 12.58 ± 2.78 0.002
Multiscale
  MSE index (scales 1 to 4) 2.80 ± 2.60 5.78 ± 2.45 0.001

Results for entropy-based measures. Values of sample entropy (SampEn) are presented for r = 20% of the time series' standard deviation and for r = 6 ms. Values of quadratic sample entropy (QSampEn; see appendix) are presented for a minimum number of matches (M) of 30. The multiscale entropy (MSE) index, defined as the summation of SampEn values for scales 1 to 4 is presented. In all cases, the parameter m was set to 2. See text for details.