High-frequency power of heart rate variability can predict the outcome of thoracic surgical patients with acute respiratory distress syndrome on admission to the intensive care unit: a prospective, single-centric, case-controlled study

Table 5 Linear regression analyses for predicting the ICU stay days in patients with ARDS

	Univariate analysis
	Unstandardized coefficients		p value
	B	Standard Error	p value
TP	0.005	0.011	0.681
LFP	−0.008	0.024	0.740
HFP	−0.005	0.012	0.686
RASS	−0.615	0.361	0.108

The ICU stay days were analyzed in ln-transformation manner due to non-normality property. HFP: high-frequency power; TP: total power; LFP: low-frequency power

ISSN: 1471-2253