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Table 3 Multivariable linear regression (stepwise) showing significant sociodemographic, clinical, and psychological variables of total fatigue as measured with the MFI-20 in chronically critically ill patients (N = 91) 6 months following the discharge from ICU at acute care hospital. The final model was controlled for age and gender

From: Self-reported fatigue following intensive care of chronically critically ill patients: a prospective cohort study

Multivariable linear regressiona
  Beta CI p value
Sociodemographic variables
 Gender (male vs. female) − .23 − .91–(−).11 .013*
Clinical variables
 Number of medical comorbidities .18 .00–.35 .045*
Psychological variables 6 months following ICU
 Diagnosis of major depression according to SCID I .44 .80–1.87 < .001**
Prior psychiatric history
 History of anxiety disorder .32 .55–1.85 < .001**
R2 (corrected): .318 (F(4, 90) = 11.497, p < .001)    
  1. aMethod stepwise; number of medical comorbidities and PTSD at t3/family status were significantly correlated (point biserial coefficient = .251, p = .016/.380, p < .001). For parsimony of the final model and to prevent multicollinearity, PTSD at t3 and family status were not considered in the final model. Tolerance/variance inflation factor and condition number test did not indicate multicollinearity
  2. MFI-20 Multidimensional Fatigue Inventory, SCID I Structured Clinical Interview according to DSM IV
  3. *p ≤ .05, **p ≤ .001