Details

Autor(en) / Beteiligte

• Cheung, Yin-Bun, PhD
• Thumboo, Julian, FRCP (Edin)
• Gao, Fei, PhD
• Ng, Gim-Yew, BSc
• Pang, Grace, MRCP
• Koo, Wen-Hsin, MRCP
• Sethi, Vijay-Kumar, FRCR
• Wee, Joseph, FRCR
• Goh, Cynthia, PhD

Titel

Mapping the English and Chinese Versions of the Functional Assessment of Cancer Therapy–General to the EQ-5D Utility Index

Ist Teil von

• Value in health, 2009-03, Vol.12 (2), p.371-376

Ort / Verlag

Malden, USA: Elsevier Inc

Erscheinungsjahr

2009

Quelle

Applied Social Sciences Index & Abstracts (ASSIA)

Beschreibungen/Notizen

• Abstract Objective This study aims to develop a function for mapping the English and Chinese versions of the Functional Assessment of Cancer Therapy–General (FACT–G) scores to the EuroQoL Group's EQ-5D utility index and to test whether a single function is sufficient for the two language versions. Methods A baseline survey of 558 cancer patients in Singapore using the FACT–G and EQ-5D was conducted (308 English and 250 Chinese questionnaires). Regression models were used to predict the EQ-5D utility index values based on the FACT–G scores and thus derive a mapping equation. Data from a follow-up survey of the patients were used to validate the results. Results The FACT–G Social/Family scale was not associated with the EQ-5D utility index ( P = 0.701). There was no interaction between language version and the predictors (each P > 0.1). An equation that maps the FACT–G Physical, Emotional, and Functional well-being scales to the EQ-5D utility index was derived. In the validation sample, the mean observed utility values was larger than the mapped by only 0.005 (95% confidence interval [CI] −0.006 to 0.016), but the mean absolute difference was 0.083 (95% CI 0.076 to 0.090). Conclusions At the group level, but not individual level, the equation developed can accurately map the English and Chinese versions of the FACT–G scores to the EQ-5D utility index.