Estimation of expected utility gained from the helmet law in Taiwan by quality-adjusted survival time

Jau Yih Tsauo, Jing Shiang Hwang, Wen Ta Chiu, Ching Chang Hung, Jung Der Wang

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The objective of this study was to empirically estimate the expected utility gained from the implementation of the 1997 helmet law in Taiwan by using quality-adjusted survival time (QAST). We randomly selected 400 out of 8221 registered cases of head injury and successfully interviewed 99 cases with the index of health-related quality of life (IHRQ). The function of IHRQ was then multiplied with the corresponding survival function to obtain the QAST for head injury. The total utility gained from the helmet law in Taipei within 1 year was estimated by multiplying the expected loss of utility per patient with the number of prevented cases. The results showed that after 80 months of follow-up, the QAST of the injured population was 66.3 quality-adjusted life-months (QALMs), while that of the reference population was 78.7 QALMs. We extrapolated the QAST for total life expectancy by simulating the survival of head injury cases using the life table data from the general population. The life-long utility loss of a head injury case was found to be 4.8 quality-adjusted life-years (QALY). The number of prevented cases during the first year of enforcement of the helmet law was estimated to be 1300 cases in Taipei, which amounted to 6240 QALYs gained. For lack of data, we were unable to calculate the possible gain from helmet on reduction of severity among nonfatal cases with head injury, and the estimation was only a lower bound. We concluded that the QAST approach is a feasible approach applicable to health policy decision-making, especially in cost-utility analysis.

Original languageEnglish
Pages (from-to)253-263
Number of pages11
JournalAccident Analysis and Prevention
Volume31
Issue number3
Publication statusPublished - May 1999

Fingerprint

Head Protective Devices
Taiwan
Health
Craniocerebral Trauma
Survival
Law
Quality of Life
Quality-Adjusted Life Years
Decision making
quality of life
Population
utility analysis
Law Enforcement
Life Tables
Policy Making
Health Policy
Life Expectancy
time
Costs
life expectancy

Keywords

  • Cost-utility analysis
  • Head injury
  • Quality-adjusted survival time

ASJC Scopus subject areas

  • Chemical Health and Safety
  • Safety, Risk, Reliability and Quality
  • Public Health, Environmental and Occupational Health
  • Human Factors and Ergonomics
  • Law
  • Safety Research
  • Transportation

Cite this

Tsauo, J. Y., Hwang, J. S., Chiu, W. T., Hung, C. C., & Wang, J. D. (1999). Estimation of expected utility gained from the helmet law in Taiwan by quality-adjusted survival time. Accident Analysis and Prevention, 31(3), 253-263.

Estimation of expected utility gained from the helmet law in Taiwan by quality-adjusted survival time. / Tsauo, Jau Yih; Hwang, Jing Shiang; Chiu, Wen Ta; Hung, Ching Chang; Wang, Jung Der.

In: Accident Analysis and Prevention, Vol. 31, No. 3, 05.1999, p. 253-263.

Research output: Contribution to journalArticle

Tsauo, JY, Hwang, JS, Chiu, WT, Hung, CC & Wang, JD 1999, 'Estimation of expected utility gained from the helmet law in Taiwan by quality-adjusted survival time', Accident Analysis and Prevention, vol. 31, no. 3, pp. 253-263.
Tsauo, Jau Yih ; Hwang, Jing Shiang ; Chiu, Wen Ta ; Hung, Ching Chang ; Wang, Jung Der. / Estimation of expected utility gained from the helmet law in Taiwan by quality-adjusted survival time. In: Accident Analysis and Prevention. 1999 ; Vol. 31, No. 3. pp. 253-263.
@article{971e0e44ddd54e74bfa4f9165c21826f,
title = "Estimation of expected utility gained from the helmet law in Taiwan by quality-adjusted survival time",
abstract = "The objective of this study was to empirically estimate the expected utility gained from the implementation of the 1997 helmet law in Taiwan by using quality-adjusted survival time (QAST). We randomly selected 400 out of 8221 registered cases of head injury and successfully interviewed 99 cases with the index of health-related quality of life (IHRQ). The function of IHRQ was then multiplied with the corresponding survival function to obtain the QAST for head injury. The total utility gained from the helmet law in Taipei within 1 year was estimated by multiplying the expected loss of utility per patient with the number of prevented cases. The results showed that after 80 months of follow-up, the QAST of the injured population was 66.3 quality-adjusted life-months (QALMs), while that of the reference population was 78.7 QALMs. We extrapolated the QAST for total life expectancy by simulating the survival of head injury cases using the life table data from the general population. The life-long utility loss of a head injury case was found to be 4.8 quality-adjusted life-years (QALY). The number of prevented cases during the first year of enforcement of the helmet law was estimated to be 1300 cases in Taipei, which amounted to 6240 QALYs gained. For lack of data, we were unable to calculate the possible gain from helmet on reduction of severity among nonfatal cases with head injury, and the estimation was only a lower bound. We concluded that the QAST approach is a feasible approach applicable to health policy decision-making, especially in cost-utility analysis.",
keywords = "Cost-utility analysis, Head injury, Quality-adjusted survival time",
author = "Tsauo, {Jau Yih} and Hwang, {Jing Shiang} and Chiu, {Wen Ta} and Hung, {Ching Chang} and Wang, {Jung Der}",
year = "1999",
month = "5",
language = "English",
volume = "31",
pages = "253--263",
journal = "Accident Analysis and Prevention",
issn = "0001-4575",
publisher = "Elsevier Limited",
number = "3",

}

TY - JOUR

T1 - Estimation of expected utility gained from the helmet law in Taiwan by quality-adjusted survival time

AU - Tsauo, Jau Yih

AU - Hwang, Jing Shiang

AU - Chiu, Wen Ta

AU - Hung, Ching Chang

AU - Wang, Jung Der

PY - 1999/5

Y1 - 1999/5

N2 - The objective of this study was to empirically estimate the expected utility gained from the implementation of the 1997 helmet law in Taiwan by using quality-adjusted survival time (QAST). We randomly selected 400 out of 8221 registered cases of head injury and successfully interviewed 99 cases with the index of health-related quality of life (IHRQ). The function of IHRQ was then multiplied with the corresponding survival function to obtain the QAST for head injury. The total utility gained from the helmet law in Taipei within 1 year was estimated by multiplying the expected loss of utility per patient with the number of prevented cases. The results showed that after 80 months of follow-up, the QAST of the injured population was 66.3 quality-adjusted life-months (QALMs), while that of the reference population was 78.7 QALMs. We extrapolated the QAST for total life expectancy by simulating the survival of head injury cases using the life table data from the general population. The life-long utility loss of a head injury case was found to be 4.8 quality-adjusted life-years (QALY). The number of prevented cases during the first year of enforcement of the helmet law was estimated to be 1300 cases in Taipei, which amounted to 6240 QALYs gained. For lack of data, we were unable to calculate the possible gain from helmet on reduction of severity among nonfatal cases with head injury, and the estimation was only a lower bound. We concluded that the QAST approach is a feasible approach applicable to health policy decision-making, especially in cost-utility analysis.

AB - The objective of this study was to empirically estimate the expected utility gained from the implementation of the 1997 helmet law in Taiwan by using quality-adjusted survival time (QAST). We randomly selected 400 out of 8221 registered cases of head injury and successfully interviewed 99 cases with the index of health-related quality of life (IHRQ). The function of IHRQ was then multiplied with the corresponding survival function to obtain the QAST for head injury. The total utility gained from the helmet law in Taipei within 1 year was estimated by multiplying the expected loss of utility per patient with the number of prevented cases. The results showed that after 80 months of follow-up, the QAST of the injured population was 66.3 quality-adjusted life-months (QALMs), while that of the reference population was 78.7 QALMs. We extrapolated the QAST for total life expectancy by simulating the survival of head injury cases using the life table data from the general population. The life-long utility loss of a head injury case was found to be 4.8 quality-adjusted life-years (QALY). The number of prevented cases during the first year of enforcement of the helmet law was estimated to be 1300 cases in Taipei, which amounted to 6240 QALYs gained. For lack of data, we were unable to calculate the possible gain from helmet on reduction of severity among nonfatal cases with head injury, and the estimation was only a lower bound. We concluded that the QAST approach is a feasible approach applicable to health policy decision-making, especially in cost-utility analysis.

KW - Cost-utility analysis

KW - Head injury

KW - Quality-adjusted survival time

UR - http://www.scopus.com/inward/record.url?scp=0033126430&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033126430&partnerID=8YFLogxK

M3 - Article

C2 - 10196602

AN - SCOPUS:0033126430

VL - 31

SP - 253

EP - 263

JO - Accident Analysis and Prevention

JF - Accident Analysis and Prevention

SN - 0001-4575

IS - 3

ER -