The Flinders Fatigue Scale - Perelman School of Medicine

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Independent samples t-tests were performed between good sleepers and poor ..... Gentile S, Delaroziere JC, Favre F, Sambuc R, San Marco JL. Vali- dation of ...
SCIENTIFIC INVESTIGATIONS

The Flinders Fatigue Scale: Preliminary Psychometric Properties and Clinical Sensitivity of a New Scale for Measuring Daytime Fatigue associated with Insomnia Michael Gradisar, Ph.D.1,2; Leon Lack, Ph.D.1,2; Hayley Richards, B.Psyc.(Hon.)1,2; Jodie Harris, B.Psyc.(Hon.)1,2; Julie Gallasch, B.Psyc.(Hon.)1; Michelle Boundy, B.Psyc.(Hon.)1; Anna Johnston, B.Psyc.(Hon.)1 School of Psychology, Flinders University, Adelaide, South Australia; 2Adelaide Institute for Sleep Health, Repatriation General Hospital, Daw Park, South Australia

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Study objectives: To evaluate the psychometric properties and clinical VLJQL¿FDQFH RI D QHZ VFDOH IRU PHDVXULQJ GD\WLPH IDWLJXH DVVRFLDWHG with insomnia: The Flinders Fatigue Scale (FFS). Methods: The 7-item FFS was used in two separate studies. Study 1 was an on-line validation study involving 1093 volunteers (mean [SD] age = 38.6 [14.7] y, 626 poor sleepers, 467 good sleepers) in a crosssectional design; Study 2 investigated the clinical sensitivity of the FFS on 113 insomnia patients (mean [SD] age = 48.3 [15.0] y) in response to a 5-week cognitive-behavior therapy for insomnia (CBT-I) program. Results: The FFS had an internal consistency of 0.91; it comprised a single factor, accounting for 67% of the total variance. Poor sleepers in Study VFRUHGVLJQL¿FDQWO\KLJKHUWKDQJRRGVOHHSHUVRQWKH))6 S 

,Q6WXG\VLJQL¿FDQWUHGXFWLRQVLQ))6VFRUHVZHUHIRXQGLQUHVSRQVHWR &%7, S 7KHVHUHGXFWLRQVLQIDWLJXHFRUUHODWHGZLWKLPSURYHPHQWVRQVXEMHFWLYHVOHHSSDUDPHWHUV DOOS 7KH))6VKRZHG good discriminant validity with the Epworth Sleepiness Scale. Conclusions: The Flinders Fatigue Scale is a brief, clinically sensitive measure with strong psychometric properties. Keywords: Daytime fatigue, insomnia, daytime functioning, psychometrics, daytime sleepiness Citation: Gradisar M; Lack L; Richards H; Harris J; Gallasch J; Boundy 0 -RKQVWRQ $ 7KH ÀLQGHUV IDWLJXH VFDOH SUHOLPLQDU\ SV\FKRPHWULF properties and clinical sensitivity of a new scale for measuring daytime fatigue associated with insomnia. J Clin Sleep Med 2007;3(7):722-728.

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Fatigue Measure for Insomnia

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