Reliability of Thai Version of SF -36 Questionnaire for the Evaluation of Quality of Life in Cardiac Patients

RUNGROJ KRITTAYAPHONG,M.D.*, KIERTIJAI BHURIPANYO,M.D.**, ONGKARN RAUNGRA TANAAMPORN, M.D.**, CHUNHAKASEM CHOTINAIW AT ARAKUL, M.D.**, NITHIMA CHAOWALIT, M.D.*, KESAREE PUNLEE, B.Sc.**, CHARUWAN KANGKAGATE, M.S.**, SUPHACHAI CHAITHIRAPHAN, M.D., FACC**

Affiliation : * Division of Cardiology, ** Department of Medicine, Her Majesty Cardiac Center, Faculty of Medicine Siriraj Hospital. Mahidol University. Bangkok 10700, Thailand.

AbstractQuality of life is an important measurement of medical outcomes. Reliability of a Thai version of the SF-36 questionnaire has never been reported. The objective of this study was to determine the reliability of a Thai version of the SF-36 questionnaire in cardiac patients. We developed a Thai version of the SF-36 questionnaire and tested it in 212 cardiac patients. Reli- ability of the Thai version of the SF-36 questionnaire was assessed by internal consistency using Cronbach' s Alpha statistic and inter-item correlation.
We demonstrated that Cronbach's Alpha coefficient of every aspect of QOL exceeded 0.7, and all inter-item correlation exceeded 0.4. In conclusion, the Thai version of the SF-36 ques- tionnaire is a valuable tool in assessing medical outcomes and medical research in Thai patients with cardiac disease. Whether it can be used in other diseases remains unknown.

Keywords : Reliability, SF-36 Questionnaire, Quality of Life

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