title: Validation study of the Japanese version of the brief fatigue inventory.
abstract: Fatigue has been recognized as one of the most distressing symptoms in cancer patients. Concise assessment is essential to managing this symptom. To that end, the Brief Fatigue Inventory (BFI), a 9-item questionnaire, was designed to assess fatigue in cancer patients. The purpose of this study was to examine the validity and reliability of the Japanese version of this scale (BFI-J), when compared with previously validated fatigue instruments. We randomly selected 252 cancer patients and presented them with the BFI-J, along with the Cancer Fatigue Scale; Profile of Mood States fatigue, vigor, and depression subscales; and European Organization for Research and Treatment of Cancer QLQ-C30. Specifically, the reliability and construct, criterion, convergent, and discriminant validity of each instrument were evaluated. Additionally, fatigue severity classification was explored using the BFI-J. The results indicated that the BFI-J is a brief, valid, and feasible measure of fatigue for use with Japanese cancer patients.
authors.affiliation: Pain Research Group, Division of Anesthesiology and Critical Care, The University of Texas M.D. Anderson Cancer Center, Houston, TX, USA.
authors.forename: Toru
authors.initials: T
authors.lastname: Okuyama
authors.forename: Xin Shelley
authors.initials: XS
authors.lastname: Wang
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Akechi
authors.forename: Tito R
authors.initials: TR
authors.lastname: Mendoza
authors.forename: Takashi
authors.initials: T
authors.lastname: Hosaka
authors.forename: Charles S
authors.initials: CS
authors.lastname: Cleeland
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Uchitomi
mesh_terms: D000368:Aged; D005221:Fatigue / Q000175:diagnosis* / Q000503:physiopathology; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires / Q000592:standards*