The Malay Version of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC-QLQ C30): Reliability and Validity Study | Zendy

Nasir Yusoff | Zendy; Low WY | Zendy; Yip CH | Zendy

Open Access

The Malay Version of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC-QLQ C30): Reliability and Validity Study

Author(s) -

Nasir Yusoff,

Low WY,

Yip CH

Publication year - 2010

Publication title -

iium medical journal malaysia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.139

H-Index - 9

eISSN - 2735-2285

pISSN - 1823-4631

DOI - 10.31436/imjm.v9i2.720

Subject(s) - medicine , intraclass correlation , cronbach's alpha , quality of life (healthcare) , malay , breast cancer , discriminant validity , reliability (semiconductor) , scale (ratio) , physical therapy , cancer , clinical psychology , gynecology , internal consistency , psychometrics , nursing , linguistics , philosophy , power (physics) , physics , quantum mechanics

The Malay Version of EORTC-QLQ C30 was validated among Malaysian women who had undergone breast cancer surgery. Materials and Methods: Test-retest evaluation (i.e. three weeks and ten weeks following surgery) was carried out to examine the validity and reliability of the scale. The Cronbach’s alpha value was used to determine the internal consistency, meanwhile, test-retest Intraclass Correlation Coefficients (ICC) indicates the reliability of the scale. Effect Size Index and Mean Differences interpret the sensitivity of the scale. Discriminant validity was evaluated by comparing two groups i.e. women who had mastectomy and women who had lumpectomy. Results: Internal consistencies are acceptable for Global Health Status (0.91), Functional domains (ranging from 0.50-0.89) and Symptomatology domains (ranging from 0.75-0.99). Intraclass Correlation Coefficient (ICC) ranged from 0.05 to 0.99 for Global Health Status and Functional domains, and ranged from 0.13 to 1.00 for Symptomatology domains. Sensitivity of the scale was observed in nearly all of the domains. Conclusion: The Malay Version of the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC-QLQ C30) is a suitable tool to measure the quality of life of women with breast cancer. KEYWORDS: Breast cancer, internal consistency, discriminant validity, EORTC malay version, intraclass correlation coefficient

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