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 6

Multiple linear regression investigating the relationship of MFI-20 reduced activity (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)	12.080	1.022	—	<0.001	10.033	14.127	—	—
Intubation	-2.733	0.957	-0.309	0.006	-4.650	-0.817	1.000	1.000
HADS depression	0.353	0.129	0.331	0.009	0.094	0.612	0.795	1.258
ISI Total	0.146	0.070	0.252	0.114	0.005	0.286	0.795	1.258

adjusted, 0.346; change, 0.311; Sig change, <0.001.