The European Organization for Research and Treatment
of Cancer Quality of Life Questionnaire : Translation and
Reliability Study of The Thai Version
THITIY A SIRISINHA, M.D.*, VORACHAI RATANATHARATHORN, M.D.*,
MANMANA JIRAJARUS, R.N. **, SUWANEE SIRILERTTRAKUL, R.N.**,
CHATCHAW AN SILPAKIT, M.D., Ph.D.***, EKAPOP SIRACHAINAN, M.D.*,
TA WEE TANVETY ANON, M.D.****
Affiliation : * Medical Oncology Unit, Depatment of Medicine,
** Medical Division, Nursing Department,
*** Department of Psychiatry, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400,
Thailand.
**** Loyola University Medical Center, Maywood, lL, USA.
AbstractIn the past decade, increasing attention is being given to more systematic and quantitative
ways to evaluate explicitly the impact of disease and medical interventions on quality of life (QOL).
Pertaining to the field of oncology, two relatively new instruments- the European Organization for
Research and Treatment of Cancer (EORTC) QLQ-C30 and the FACT-G, have received growing
attention and appear to be excellent QOL instruments in clinical settings. FACT-G has already been
validated and has been used in Thailand. Thus in the present study, the English version of the EORTC
quality of life questionnaire (QLQ-C30) was translated into Thai and the initial descriptive statistic
and scale reliability were reported. Mean score in this study of 75 cancer patients was comparable with
the original report. Cronbach's alpha coefficient for multi-item scales range from 0.64 to 0.89. The
validity of this translated version will be reported at a later date. The initial findings of the present
study indicate that the Thai version of the EORTC QLQ-C30 is reliable. A validating process of this
version is in progress with active patients accrual ongoing at present.
Keywords : Quality of life, EORTC QLQ-C30 Thai version
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