정신신체의학 (Korean Journal of Psychosomatic Medicine)

한국정신신체의학회 (Korean Psychosomatic Society)
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불안 및 우울장애를 주요 진단으로 하는 정신건강의학과 외래환자 대상 한국판 질병침습도 평가척도의 요인 타당도 연구

Factorial Validity of the Korean Version of the Illness Intrusive Rating Scale among Psychiatric Outpatients Mainly Diagnosed with Anxiety or Depressive Disorders

  • 조유빈 (한양대학교 의과대학 정신건강의학과교실) ;
  • 김대호 (한양대학교 의과대학 정신건강의학과교실) ;
  • 김은경 (한양대학교 구리병원 트라우마-스트레스 프로르램) ;
  • 조화연 (한양대학교 의과대학 정신건강의학과교실) ;
  • 윤미림 (한양대학교 의과대학 정신건강의학과교실) ;
  • 이호선 (한양대학교 의과대학 정신건강의학과교실)
  • Cho, Yubin (Department of Psychiatry, Hanyang University College of Medicine) ;
  • Kim, Daeho (Department of Psychiatry, Hanyang University College of Medicine) ;
  • Kim, Eunkyung (Trauma and Stress Program, Hanyang University Guri Hospital) ;
  • Jo, Hwa Yeon (Department of Psychiatry, Hanyang University College of Medicine) ;
  • Yun, Mirim (Department of Psychiatry, Hanyang University College of Medicine) ;
  • Lee, Hoseon (Department of Psychiatry, Hanyang University College of Medicine)
  • 투고 : 2019.05.18
  • 심사 : 2019.07.29
  • 발행 : 2019.12.31
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초록

연구목적 질병침습도 평가 척도(Illness Intrusiveness Rating Scale)란, 만성 질환을 앓는 환자에서 질병이나 치료가 삶의 질에 얼마나 영향을 미치는지 평가하기 위한 타당도가 입증된 자가보고식 검사이다. 여러 연구를 통하여 만성 질환자에서 요인 모델의 적합도가 보고되었으나, 정신 질환자를 대상으로는 그 요인 타당도가 확인되지 않았다. 본 연구는 불안 및 우울장애가 주요 진단인 정신건강의학과 외래환자 군을 대상으로 한국판 질병침습도 평가 척도(Illness Intrusiveness Rating Scale-Korean version, IIRS-K)의 요인 구조를 확인하고, 요인 타당도를 조사하기 위하여 진행되었다. 방 법 2010년부터 2013년까지 3년간 한양대학교 구리병원 정신건강의학과 외래 초진 환자를 연속적 수집하여 총 307명의 자료를 분석하였다. IIRS-K, Zung 자가평가 우울척도, Zung 자가평가 불안척도를 이용하였다. Cronbach's α계수를 통해 신뢰도를 분석하였고, Varimax 직각회전을 이용한 탐색적 주성분 분석과 최대우도법 중 보수적인 방법을 추정자(standard maximum likelihood estimator)로 확인적 요인분석을 시행하였다. IIRS-K의 하위 요인과 우울, 불안 증상간의 타당도는 Spearman 상관 분석으로 조사하였다. 결 과 IIRS-K의 내적 일치도는 0.9로 높은 신뢰도를 보였다. 13개 문항에서 3개 요인이 추출되었고, 총 분산의 63.2%를 설명하여, 58.3%를 설명한 원본 영문판과 유사한 요인 구조를 보였다. 3요인 분석이 가장 모델에 적합한 것을 확인적 요인분석으로 확인하였으며, 우울 및 불안 증상과도 정적인 상관관계를 보여 수렴 타당도를 입증하였다. 결 론 IIRS-K의 3요인구조는 조용한 취미 활동, 개인 발전 등 일부 문항 구성에서 원본과 차이를 보였고, 가족 관계나 배우자와의 관계, 경제 문제가 한 요인에 추출되는 것이 특징적이었다. 이는 문화적 특징을 반영한 결과라고 볼 수 있다. 이 연구는 정신건강의학과 임상군을 대상으로 IIRS-K의 요인 타당도를 입증한 첫 연구이며, 이를 통해 국내 정신건강의학과 환자의 삶의 질에 사용될 유용한 도구를 제공했다는 의의가 있다.

Objectives : The Illness Intrusiveness Rating Scale (IIRS) is a well-validated self-report instrument for assessing negative impact of chronic illness and/or adverse effects of its treatment on everyday life domains. Although extensive literature probed its psychometric properties in medical illness, little attention was paid for its validity for psychiatric population. This study aimed to test factorial structure of the Korean Version of the IIRS (IIRS-K) in a consecutive sample of psychiatric outpatients. Methods : Data set of 307 first-visit patients of psychiatric clinic at Guri Hanyang univ. Hospital were used. Exploratory and confirmatory factor analysis, internal consistency were tested in IIRS-K. We also checked Spearman's correlation analysis between IIRS-K, Zung's self-report anxiety scale and Zung's self-report depression scale. Results : 76.9% of the patients were with anxiety disorder and depressive disorder. The principal component factor analysis of the IIRS-K extracted three-factor structure accounted for 63.2% of total variance that was contextually similar to the original English version. This three-factor solution showed the best fit when tested confirmatory factor analysis compared to the original IIRS, two-factor model of IIRS-K suggested from medical outpatients, and one-factor solution. The IIRS-K also showed good internal consistency (Cronbach's α=0.90) and good convergent validity with anxiety and depression scales. Conclusions : The IIRS-K showed the three-factor structure that was similar but not identical to original version. Overall, this study proved factorial validity of the IIRS-K and it can be used for Korean clinical population.

키워드

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