The EQ-5D-5L valuation study in Nigeria
Issued Date
2026-08-01
Resource Type
ISSN
09629343
eISSN
15732649
Scopus ID
2-s2.0-105041855405
Journal Title
Quality of Life Research
Volume
35
Issue
8
Rights Holder(s)
SCOPUS
Bibliographic Citation
Quality of Life Research Vol.35 No.8 (2026)
Suggested Citation
Yusuf A.H., Ardo B.U., Thavorncharoensap M., Roudijk B., Purba F.D., Yang Z., Liao M., Chaikledkaew U., Youngkong S., Thakkinstian A., Agada-Amade Y.A., Amole T.G., Sambo M.N., Ohiri K. The EQ-5D-5L valuation study in Nigeria. Quality of Life Research Vol.35 No.8 (2026). doi:10.1007/s11136-026-04319-4 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/117476
Title
The EQ-5D-5L valuation study in Nigeria
Author's Affiliation
National University of Singapore
Erasmus MC
Mahidol University
University of Nigeria
Universitas Padjadjaran
Guiyang Medical College
Ahmadu Bello University
Faculty of Medicine Ramathibodi Hospital, Mahidol University
Aminu Kano Teaching Hospital
EuroQol Research Foundation
National Health Insurance Authority
Erasmus MC
Mahidol University
University of Nigeria
Universitas Padjadjaran
Guiyang Medical College
Ahmadu Bello University
Faculty of Medicine Ramathibodi Hospital, Mahidol University
Aminu Kano Teaching Hospital
EuroQol Research Foundation
National Health Insurance Authority
Corresponding Author(s)
Other Contributor(s)
Abstract
Purpose: A country-specific EQ-5D-5L value set ensures that health utility estimates reflect national preferences, enabling contextually appropriate health technology assessment (HTA) to inform efficient resource allocation decisions. This study aimed to develop the first EQ-5D-5L value set for Nigeria. Methods: Adult Nigerians were recruited from 12 states using multi-stage stratified quota sampling based on age, sex, and education. Face-to-face interviews were conducted through Computer-Assisted Personal Interviews using the EQ-PVT protocol. The interview comprises 2 main parts: composite time-trade-off (cTTO) and discrete choice experiment (DCE) tasks. The cTTO data were modelled using random intercept, Tobit, linear (heteroskedasticity-corrected), and Tobit (heteroskedasticity-corrected) models. DCE data were analyzed using Mixed Logit Model (MLM). Hybrid models combining the cTTO and DCE data were also estimated. Results: A total of 1,200 interviews were conducted. The Hybrid Tobit model with intercept, corrected for heteroscedasticity, and excluded flagged responses was considered the preferred model. The utility values of the best (11,111), 2nd best (21,111), worst (55,555), and 2nd worst (54,555) health states are 1, 0.963, − 0.733, and − 0.653, respectively. The most important dimension is Pain/Discomfort followed by Anxiety/Depression, Mobility, Usual Activity, and Self-care, respectively. Conclusion: This study provides the first EQ-5D-5L value set for Nigeria, derived from a representative adult population. This value set provides a strong foundation for HTA, supporting evidence-informed policy decisions and advancing progress towards Universal Health Coverage (UHC) in Nigeria and the wider West African region.