ISSN 2586-0151 (Print)
ISSN 2586-0046 (Online)
Volume 13, Number 2 (2/2017)
Original Article <page. 86-92 >

Exploratory and Confirmatory Factor Analysis of the Korean version of the Penn State Worry Questionnaire

Jun Won Jeon, MD1;Daeho Kim, MD, PhD1,2;Eunkyung Kim, PsyD2,3; and Sungwon Roh, MD, PhD1;

1;Department of Psychiatry, 3;Premedicine, Hanyang University College of Medicine, Seoul, 2;Department of Psychiatry, Hanyang University Guri Hospital, Guri, Korea

Objective : This study evaluated the factor structure of a Korean version of the Penn State Worry Questionnaire (K-PSWQ) with exploratory factor analysis in healthy adult subjects, and confirmatory factor analysis of subjects who have received psychiatric treatment.

Methods : Exploratory principal component analysis was conducted with data from 318 non-psychiatric subjects, and 118 psychiatric patients were subjected to confirmatory factor analysis (maximum likelihood estimation). Participants were voluntary visitors at the booth who agreed to undergo screening for anxiety disorder at 2013 & 2014 Korea Mental Health Exhibitions.

Results : Exploratory analysis revealed a two factor structure of the scale with total variance of 56.3%. Factor 1 was considered 'Worry engagement', and factor 2 was considered 'Absence of worry'. However, the results of the confirmatory factor analysis supported that both one factor model with method factor and two factor model are fit to structure of the scale considering fit indices. Internal consistency of total questions was good (Cronbach's α=0.899).

Conclusion : Our results supported the previously suggested factor structure of the PSWQ, and proved factorial validity of the K-PSWQ in both populations.

Key words : Generalized anxiety disorder;Worry;Penn state worry questionnaire;Factor analysis;Factor structure.

Anxiety and Mood

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