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Psychometric Properties of the Korean Version of Functioning Assessment Short Test in Bipolar Disorder

Published online by Cambridge University Press:  19 July 2023

H. Kang ,
B.-H. Yoon ,
H. Yun ,
Y. Jeong  and
J. Song
H. Kang*
Affiliation:
Psychiatry, Naju national hospital, Naju, Korea, Republic Of
B.-H. Yoon
Affiliation:
Psychiatry, Naju national hospital, Naju, Korea, Republic Of
H. Yun
Affiliation:
Psychiatry, Naju national hospital, Naju, Korea, Republic Of
Y. Jeong
Affiliation:
Psychiatry, Naju national hospital, Naju, Korea, Republic Of
J. Song
Affiliation:
Psychiatry, Naju national hospital, Naju, Korea, Republic Of
*
*Corresponding author.

Abstract

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Introduction

The Functioning Assessment Short Test (FAST) is a relatively specific test for bipolar disorders designed to assess the main functioning problems experienced by patients.

Objectives

FAST includes 24 items assessing impairment or disability in 6 domains of functioning: autonomy, occupational functioning, cognitive functioning, financial issues, interpersonal relationships, and leisure time. It has already been translated into standardized versions in several languages. The aim of this study is to measure the validity and reliability of the Korean version of FAST (K-FAST).

Methods

A total of 209 bipolar disorder patients were recruited from 14 centers in Korea. K-FAST, Young Mania Rating Scale (YMRS), Bipolar Depression Rating Scale (BDRS), Global Assessment of Functioning (GAF) and the World Health Organization Quality of Life Assessment Instrument Brief Form (WHOQOL-BREF) were administered, and psychometric analysis of the K-FAST was conducted

Results

The internal consistency (Cronbach’s alpha) of the K-FAST was 0.95. Test-retest reliability analysis showed a strong correlation between the two measures assessed at a 1-week interval (ICC = 0.97; p < 0.001). The K-FAST exhibited significant correlations with GAF (r=-0.771), WHOQOL-BREF (r=-0.326), YMRS (r=0.509) and BDRS (r=0.598). A strong negative correlation with GAF pointed to a reasonable degree of concurrent validity. Although the exploratory factor analysis showed 4 factors, the confirmatory factor analysis of questionnaires had a good fit for a six factors model (CFI=0.925; TLI=0.912; RMSEA=0.078).Table.

Model fit index of confirmatory factor analysis (n=209)

Measure of fit4-factor model6-factor modelAcceptable value
χ2/df2.8322.267<3
RMSEA (90% CI)0.094(0.086-0.102)0.078 (0.069-0.087)<0.08
CFI0.8870.925>0.9
TLI0.8730.912>0.9

χ2, chi-square; df, degrees of freedom; RMSEA, root mean square error of approximation; CFI, comparative fit index; TLI, Tucker-Lewis index.

Conclusions

The K-FAST has good psychometric properties, good internal consistency, and can be applicable and acceptable to the Korean context.

Disclosure of Interest

None Declared

Type
Abstract
Information
European Psychiatry , Volume 66 , Special Issue S1: Abstracts of the 31st European Congress of Psychiatry , March 2023 , pp. S85
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of the European Psychiatric Association
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