A Psychometric Study of the Multidimensional Fatigue Inventory to Assess Fatigue in Patients with Schizophrenia Spectrum Disorders.

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T1 - A Psychometric Study of the Multidimensional Fatigue Inventory to Assess Fatigue in Patients with Schizophrenia Spectrum Disorders.

AU - Hedlund, Lena

AU - Lundvik Gyllensten, Amanda

AU - Hansson, Lars

PY - 2015

Y1 - 2015

N2 - Fatigue is frequently reported by patients with mental illness. The multidimensional fatigue inventory (MFI-20) is a self-assessment instrument with 20 items including five dimensions of fatigue. The purpose of this study was to examine the test-retest reliability, internal consistency, convergent construct validity and feasibility of using MFI-20 in patients with schizophrenia spectrum disorders. Patients completed two self-assessment instruments, MFI-20 (n = 93) and Visual Analogue Scale (n = 79), twice within 1 week ±2 days. Fifty-three patients also rated the feasibility of responding to the MFI-20 with a Likert scale. The test-retest reliability and validity were analysed by using Spearman's correlations and internal consistency by calculating Cronbach's α. The test-retest showed a correlation between .66 and .91 for all subscales of MFI. The internal consistency was .92. The analysis of convergent construct validity showed a correlation of .68 (time 1) and .77 (time 2). No item was systematically identified as being difficult to answer.

AB - Fatigue is frequently reported by patients with mental illness. The multidimensional fatigue inventory (MFI-20) is a self-assessment instrument with 20 items including five dimensions of fatigue. The purpose of this study was to examine the test-retest reliability, internal consistency, convergent construct validity and feasibility of using MFI-20 in patients with schizophrenia spectrum disorders. Patients completed two self-assessment instruments, MFI-20 (n = 93) and Visual Analogue Scale (n = 79), twice within 1 week ±2 days. Fifty-three patients also rated the feasibility of responding to the MFI-20 with a Likert scale. The test-retest reliability and validity were analysed by using Spearman's correlations and internal consistency by calculating Cronbach's α. The test-retest showed a correlation between .66 and .91 for all subscales of MFI. The internal consistency was .92. The analysis of convergent construct validity showed a correlation of .68 (time 1) and .77 (time 2). No item was systematically identified as being difficult to answer.

U2 - 10.1007/s10597-014-9746-3

DO - 10.1007/s10597-014-9746-3

M3 - Article

C2 - 24972909

VL - 51

SP - 377

EP - 382

JO - Community Mental Health Journal

JF - Community Mental Health Journal

SN - 0010-3853

IS - 3

ER -