title: Psychometric properties of the Brief Fatigue Inventory in community-dwelling older adults.
abstract: OBJECTIVE
  To investigate the psychometric properties of the Brief Fatigue Inventory (BFI) in community-dwelling older adults.
  
  
  METHODS
  Cross-sectional validation study.
  
  
  METHODS
  Community based.
  
  
  METHODS
  Subjects (N=302) were nondemented older adults (mean age, 76.44 y; 54% women).
  
  
  METHODS
  Not applicable.
  
  
  METHODS
  BFI total, severity, and interference summation scores.
  
  
  RESULTS
  A principal component analysis (PCA) yielded 2 factors, fatigue severity and interference, explaining 65.94% of the variance. Both factors had good reliability, with Cronbach alpha values of .867 for fatigue interference and .818 for fatigue severity. Higher fatigue scores were associated with older age and worse physical and cognitive functions.
  
  
  CONCLUSIONS
  Fatigue is a common and debilitating symptom in the aging population. The current study provides novel findings in validating and establishing a bidimensional factor structure for the BFI in older adults. Severity and interference were differentially related to important health outcomes; therefore, using these subscales in addition to the total BFI score is recommended with older adults. Because of its relatively short administration time and established psychometric properties, the BFI can be successfully incorporated into longitudinal studies and clinical trials.
authors.affiliation: Ferkauf Graduate School of Psychology, Yeshiva University, Bronx, NY.
authors.forename: Melissa J
authors.initials: MJ
authors.lastname: Shuman-Paretsky
authors.affiliation: Ferkauf Graduate School of Psychology, Yeshiva University, Bronx, NY.
authors.forename: Janna
authors.initials: J
authors.lastname: Belser-Ehrlich
authors.affiliation: Ferkauf Graduate School of Psychology, Yeshiva University, Bronx, NY; Department of Neurology, Albert Einstein College of Medicine, Yeshiva University, Bronx, NY. Electronic address: roee.holtzer@einstein.yu.edu.
authors.forename: Roee
authors.initials: R
authors.lastname: Holtzer
mesh_terms: D000203:Activities of Daily Living; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003071:Cognition; D003430:Cross-Sectional Studies; D003863:Depression / Q000523:psychology; D005221:Fatigue / Q000175:diagnosis* / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D025341:Principal Component Analysis; D011594:Psychometrics; D015203:Reproducibility of Results; D012111:Residence Characteristics; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D016138:Walking / Q000502:physiology
keywords: Aging; Fatigue; Psychometrics; Questionnaires; Rehabilitation
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