title: Validity and Reliability of the Indonesian Version of the Brief Fatigue Inventory in Cancer Patients.
abstract: Cancer-related fatigue is one of the most commonly reported symptoms in cancer patients. Short but good assessment is essential to detect and manage this symptom. Brief Fatigue Inventory (BFI) is a valid and reliable short instrument to assess cancer-related fatigue.
  
  
  
  To examine the validity and reliability of the Indonesian BFI.
  
  
  
  Forward and backward translation approach, followed by cognitive debriefing process, was done to develop Indonesian BFI. One hundred twenty-one consecutive adult outpatients with cancer who are willing to participate in this study filled in Indonesian BFI along with the Medical Outcome Study Quality of Life Short Form 36 (MOS SF-36). Demographic and health data were collected.
  
  
  
  The Indonesian BFI had an overall Cronbach's alpha for the nine items of 0.956. The results of the factor analysis suggested a one-factor solution, supporting the hypothesis of unidimensionality of the Indonesian BFI. The Indonesian BFI score was compared with MOS SF-36 subscale to evaluate convergent validity. An expected inverse correlation between Indonesian BFI and all domains of MOS SF-36 was observed (r = -0.388 to -0.676; P < 0.0000). Discriminant validity analysis showed that the Indonesian BFI mean score significantly increased with increasing Eastern Cooperative Oncology Group Performance Status values (P = 0.000).
  
  
  
  Indonesian BFI is a reliable and valid instrument for Indonesian cancer patients.
authors.affiliation: Department of Physical Medicine and Rehabilitation, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Department of Medical Physiology, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia. Electronic address: mitapratama@yahoo.com.
authors.forename: Nurul
authors.initials: N
authors.lastname: Paramita
authors.affiliation: Department of Physical Medicine and Rehabilitation, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia.
authors.forename: Nury
authors.initials: N
authors.lastname: Nusdwinuringtyas
authors.affiliation: Department of Physical Medicine and Rehabilitation, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia.
authors.forename: Siti Annisa
authors.initials: SA
authors.lastname: Nuhonni
authors.affiliation: Department of Internal Medicine, Hematology and Medical Oncology Division, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia.
authors.forename: Tubagus Djumhana
authors.initials: TD
authors.lastname: Atmakusuma
authors.affiliation: Department of Psychiatry, Cipto Mangunkusumo Hospital, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia.
authors.forename: R Irawati
authors.initials: RI
authors.lastname: Ismail
authors.affiliation: Department of Symptom Research, Division of Internal Medicine, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA.
authors.forename: Tito R
authors.initials: TR
authors.lastname: Mendoza
authors.affiliation: Department of Symptom Research, Division of Internal Medicine, The University of Texas, MD Anderson Cancer Center, Houston, Texas, USA.
authors.forename: Charles S
authors.initials: CS
authors.lastname: Cleeland
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D016002:Discriminant Analysis; D005163:Factor Analysis, Statistical; D005221:Fatigue / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D007214:Indonesia; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009369:Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000453:epidemiology / Q000473:pathology; D015995:Prevalence; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: CRF; Indonesia; assessment; fatigue; reliability; validity