Estimating an EQ-5D population value set

The case of Japan

Aki Tsuchiya, Shunya Ikeda, Naoki Ikegami, Shuzo Nishimura, Ikuro Sakai, Takashi Fukuda, Chisato Hamashima, Akinori Hisashige, Makoto Tamura

Research output: Contribution to journalArticle

283 Citations (Scopus)

Abstract

Quality adjustment weights for quality-adjusted life years (QALYs) are available with the EQ-5D Instrument, which are based on a survey that quantified the preferences of the British public. However, the extent to which this British value set is applicable to other, especially non-European, countries is yet unclear. The objectives of this study are (a) to compare the evaluations obtained in Japan and Britain, and (b) to explore a local Japanese value set. A diminished study design is employed, where 17 hypothetical EQ-5D health states are evaluated as opposed to 42 in the British study. The official Japanese version of the instrument and the Time Trade-Off method are used to interview 543 members of the public. The results are: firstly, the evaluations obtained in Japan and those from Britain differ by 0.24 on average on a [-1, + 1] scale, and mean absolute error (MAE) in predicting the Japanese preferences with the British value set is 0.23. Secondly, comparable regressions suggest that the two peoples have systematically different preference structures (p<0.001 for 8 of 12 coefficients; F-test). Thirdly, using alternative models, the predictions are improved so that the local Japanese value set achieves MAE in the order of 0.01.

Original languageEnglish
Pages (from-to)341-353
Number of pages13
JournalHealth Economics
Volume11
Issue number4
DOIs
Publication statusPublished - 2002

Fingerprint

Japan
Quality-Adjusted Life Years
Population
Values
Interviews
Weights and Measures
Health
evaluation
regression
interview
health
Surveys and Questionnaires
Evaluation

Keywords

  • EQ-5D
  • Health status measurement
  • Population values
  • QALY
  • TTO

ASJC Scopus subject areas

  • Nursing(all)
  • Economics and Econometrics
  • Health(social science)
  • Health Professions(all)

Cite this

Tsuchiya, A., Ikeda, S., Ikegami, N., Nishimura, S., Sakai, I., Fukuda, T., ... Tamura, M. (2002). Estimating an EQ-5D population value set: The case of Japan. Health Economics, 11(4), 341-353. https://doi.org/10.1002/hec.673

Estimating an EQ-5D population value set : The case of Japan. / Tsuchiya, Aki; Ikeda, Shunya; Ikegami, Naoki; Nishimura, Shuzo; Sakai, Ikuro; Fukuda, Takashi; Hamashima, Chisato; Hisashige, Akinori; Tamura, Makoto.

In: Health Economics, Vol. 11, No. 4, 2002, p. 341-353.

Research output: Contribution to journalArticle

Tsuchiya, A, Ikeda, S, Ikegami, N, Nishimura, S, Sakai, I, Fukuda, T, Hamashima, C, Hisashige, A & Tamura, M 2002, 'Estimating an EQ-5D population value set: The case of Japan', Health Economics, vol. 11, no. 4, pp. 341-353. https://doi.org/10.1002/hec.673
Tsuchiya A, Ikeda S, Ikegami N, Nishimura S, Sakai I, Fukuda T et al. Estimating an EQ-5D population value set: The case of Japan. Health Economics. 2002;11(4):341-353. https://doi.org/10.1002/hec.673
Tsuchiya, Aki ; Ikeda, Shunya ; Ikegami, Naoki ; Nishimura, Shuzo ; Sakai, Ikuro ; Fukuda, Takashi ; Hamashima, Chisato ; Hisashige, Akinori ; Tamura, Makoto. / Estimating an EQ-5D population value set : The case of Japan. In: Health Economics. 2002 ; Vol. 11, No. 4. pp. 341-353.
@article{410ca7fadb3341aca25ad623c51bca74,
title = "Estimating an EQ-5D population value set: The case of Japan",
abstract = "Quality adjustment weights for quality-adjusted life years (QALYs) are available with the EQ-5D Instrument, which are based on a survey that quantified the preferences of the British public. However, the extent to which this British value set is applicable to other, especially non-European, countries is yet unclear. The objectives of this study are (a) to compare the evaluations obtained in Japan and Britain, and (b) to explore a local Japanese value set. A diminished study design is employed, where 17 hypothetical EQ-5D health states are evaluated as opposed to 42 in the British study. The official Japanese version of the instrument and the Time Trade-Off method are used to interview 543 members of the public. The results are: firstly, the evaluations obtained in Japan and those from Britain differ by 0.24 on average on a [-1, + 1] scale, and mean absolute error (MAE) in predicting the Japanese preferences with the British value set is 0.23. Secondly, comparable regressions suggest that the two peoples have systematically different preference structures (p<0.001 for 8 of 12 coefficients; F-test). Thirdly, using alternative models, the predictions are improved so that the local Japanese value set achieves MAE in the order of 0.01.",
keywords = "EQ-5D, Health status measurement, Population values, QALY, TTO",
author = "Aki Tsuchiya and Shunya Ikeda and Naoki Ikegami and Shuzo Nishimura and Ikuro Sakai and Takashi Fukuda and Chisato Hamashima and Akinori Hisashige and Makoto Tamura",
year = "2002",
doi = "10.1002/hec.673",
language = "English",
volume = "11",
pages = "341--353",
journal = "Health Economics (United Kingdom)",
issn = "1057-9230",
publisher = "John Wiley and Sons Ltd",
number = "4",

}

TY - JOUR

T1 - Estimating an EQ-5D population value set

T2 - The case of Japan

AU - Tsuchiya, Aki

AU - Ikeda, Shunya

AU - Ikegami, Naoki

AU - Nishimura, Shuzo

AU - Sakai, Ikuro

AU - Fukuda, Takashi

AU - Hamashima, Chisato

AU - Hisashige, Akinori

AU - Tamura, Makoto

PY - 2002

Y1 - 2002

N2 - Quality adjustment weights for quality-adjusted life years (QALYs) are available with the EQ-5D Instrument, which are based on a survey that quantified the preferences of the British public. However, the extent to which this British value set is applicable to other, especially non-European, countries is yet unclear. The objectives of this study are (a) to compare the evaluations obtained in Japan and Britain, and (b) to explore a local Japanese value set. A diminished study design is employed, where 17 hypothetical EQ-5D health states are evaluated as opposed to 42 in the British study. The official Japanese version of the instrument and the Time Trade-Off method are used to interview 543 members of the public. The results are: firstly, the evaluations obtained in Japan and those from Britain differ by 0.24 on average on a [-1, + 1] scale, and mean absolute error (MAE) in predicting the Japanese preferences with the British value set is 0.23. Secondly, comparable regressions suggest that the two peoples have systematically different preference structures (p<0.001 for 8 of 12 coefficients; F-test). Thirdly, using alternative models, the predictions are improved so that the local Japanese value set achieves MAE in the order of 0.01.

AB - Quality adjustment weights for quality-adjusted life years (QALYs) are available with the EQ-5D Instrument, which are based on a survey that quantified the preferences of the British public. However, the extent to which this British value set is applicable to other, especially non-European, countries is yet unclear. The objectives of this study are (a) to compare the evaluations obtained in Japan and Britain, and (b) to explore a local Japanese value set. A diminished study design is employed, where 17 hypothetical EQ-5D health states are evaluated as opposed to 42 in the British study. The official Japanese version of the instrument and the Time Trade-Off method are used to interview 543 members of the public. The results are: firstly, the evaluations obtained in Japan and those from Britain differ by 0.24 on average on a [-1, + 1] scale, and mean absolute error (MAE) in predicting the Japanese preferences with the British value set is 0.23. Secondly, comparable regressions suggest that the two peoples have systematically different preference structures (p<0.001 for 8 of 12 coefficients; F-test). Thirdly, using alternative models, the predictions are improved so that the local Japanese value set achieves MAE in the order of 0.01.

KW - EQ-5D

KW - Health status measurement

KW - Population values

KW - QALY

KW - TTO

UR - http://www.scopus.com/inward/record.url?scp=0036258783&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036258783&partnerID=8YFLogxK

U2 - 10.1002/hec.673

DO - 10.1002/hec.673

M3 - Article

VL - 11

SP - 341

EP - 353

JO - Health Economics (United Kingdom)

JF - Health Economics (United Kingdom)

SN - 1057-9230

IS - 4

ER -