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[Development and a psychometric evaluation of cardiovascular disease-specific quality of life scale for Koreans]

Eun Hyun Lee1, Seong Jai Tahk, Jun Han Shin

  • 1Graduate School of Public Health, Ajou University, Korea. ehlee@ajou.ac.kr

Taehan Kanho Hakhoe Chi
|July 7, 2007
PubMed

Insights

A new questionnaire, the cardiovascular disease-specific quality of life (CD-QOL) tool, was developed and validated for Korean patients. This instrument demonstrates strong psychometric properties for assessing health-related quality of life in cardiovascular disease populations.

Area of Science:

  • Cardiology
  • Health Outcomes Research
  • Psychometrics

Background:

  • Health-related quality of life (HRQOL) in Korean cardiovascular disease (CVD) patients is understudied.
  • A validated, disease-specific instrument for HRQOL in Korean CVD patients was lacking.

Purpose of the Study:

  • To develop and validate a cardiovascular-specific HRQOL questionnaire (CD-QOL) for Korean patients.
  • To provide a psychometrically sound tool for assessing HRQOL in this population.

Main Methods:

  • The CD-QOL was developed through item generation, a pilot study, and rigorous psychometric testing.
  • Patients from three university hospitals completed the CD-QOL, SF-36, and CES-D.
  • Data analysis included factor analysis, correlation, ANOVA, and Cronbach's alpha to assess validity and reliability.

Main Results:

  • A 22-item, five-factor CD-QOL was finalized after item reduction.
  • The CD-QOL demonstrated moderate correlations with the SF-36 and associations with depression (CES-D).
  • Patients with better functional status (NYHA/KASI Class I) reported significantly higher HRQOL scores.

Conclusions:

  • The CD-QOL is an easily applicable instrument for Korean patients with cardiovascular disease.
  • It possesses excellent psychometric properties, including content, criterion, factorial, convergent, and known-groups validity.
  • The CD-QOL demonstrates strong internal consistency reliability.
Abstract

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