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 4 Firth logistic regression analyses for predicting the mortality of patients with ARDS

Univariate Model			Multivariate model 1 Adjusted for HFP, RASS, age and gender		Multivariate model 2 Adjusted for TP, RASS, age and gender
OR (95% CI)		p value	OR (95% CI)	p value	OR (95% CI)	p value
HFP	1.013 (1.002,1.03)	0.020	1.016 (1.002,1.149)	0.025
TP	1.007 (1.00,1.02)	0.047			1.010 (1.001,1.065)	0.024
LFP	1.021 (0.998,1.05)	0.080

OR: odds ratio; 95% CI: 95% profile-likelihood confidence intervals; HFP: high-frequency power; TP: total power; LFP: low-frequency power

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