Cognitive Impairment and Fatigue in Intensive Care Patients Three Months after the Acute Phase of COVID-19 Infection: Follow-Up with Focus on Differences between the First and Later Waves of the Pandemic

Table 5

Multiple linear regression investigating the relationship of MFI-20 physical fatigue (dependent variable) with intubation, Hospital Anxiety and Depression Scale (HADS) depression, and Insomnia Severity Index (ISI).

MFI physical fatigue	Unstand. coeff.		Stand. coeff.	Sig.	95% confidence interval for		Collinearity statistics
Independent variables		SE			Lower bound	Upper bound	Tolerance	VIF
(Constant)	14.613	1.010	—	<0.001	12.591	16.635	—	—
Intubation	-2.618	0.945	-0.322	0.008	-4.511	-0.724	1.000	1.000
HADS depression	0.226	0.128	0.330	0.083	-0.030	0.482	0.795	1.258
ISI total	0.111	0.069	0.209	0.114	-0.028	0.250	0.795	1.258

adjusted, 0.205; change, 0.245; Sig change, <0.001.