The impact of a belief in life after death on health-state preferences: True difference or artifact?
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In most religions, the preservation of one’s own, God-given, life is considered obligatory, while the time trade-off method (TTO) forces one to voluntarily forego life years. We sought to verify how this conflict impacts TTO-results among the religious.
We used the data from the only EQ-5D valuation in Poland (2008, three-level, 321 respondents, 23 states each)—a very religious, mostly Catholic country. We measured the religiosity with the belief in afterlife question on two levels: strong (definitely yes) and some (also rather yes), both about a third of the sample.
The religious more often are non-traders, unwilling to give up any time in exchange for quality of life: odds ratio (OR) equal to 1.97 (strong religiosity), OR 1.55 (some religiosity); and less often consider a state worse than death: OR 0.67 (strong), OR 0.81 (some). These associations are statistically significant (\(p^*<0.001\)) and hold when controlling for possible demographic confounders. Strong religiosity abates the utility loss: in the additive approach by 0.14, in the multiplicative approach by the factor of 2.1 (both \(p^*<0.001\)), especially among the older. Removing the effect of religiosity from the value set reduces the utility by 0.05 on average.
The results may stem from a true difference in preferences or be a TTO-artifact and would vanish for other elicitation methods. Juxtaposing our findings with comments from respondents in other studies suggests the latter. Therefore, this Weltanschauung effect should be removed in cost–utility analysis.
KeywordsHealth-related quality of life Utility Preference elicitation Time trade-off Religion Life after death
A substantial part of work was done during M. Jakubczyk’s visit at The University of Iowa, thanks to the Fulbright Senior Award. We appreciate the comments during the EuroQol Group Annual Meeting 2015, after the discussion started by H. Bailey; nevertheless, the views expressed here do not necessarily reflect these of the EuroQol Group. The paper has greatly benefited from the remarks of two anonymous reviewers.
- 9.Boguszewski, R. (2012). Zmiany w zakresie wiary i religijności Polaków po śmierci Jana Pawła II. Komunikat z badań. BS/49/2012. Technical report, Centrum Badania Opinii Społecznej.Google Scholar
- 10.Boguszewski, R. (2015). Kanon wiary Polaków. Komunikat z badań CBOS. Nr 29/2015. Technical Report, Centrum Badania Opinii Społecznej.Google Scholar
- 16.Eurobarometer. (2005). Social values, Science and Technology. Technical Report, European Commission. http://ec.europa.eu/public_opinion/archives/ebs/ebs_225_report_en.
- 17.Gallup. (2004). Religion in Europe: Trust not filling the Pews. Technical Report, Gallup. http://www.gallup.com/poll/13117/religion-europe-trust-filling-pews.aspx.
- 20.Golicki, D., Jakubczyk, M., Niewada, M., Wrona, W., & Busschbach, J. (2013). Is extending of a TTO experiment to 23 states per respondent justifiable? An empirical answer from Polish EQ-5D valuation study. Journal of Health Policy & Outcomes Research, 1, 110–117.Google Scholar
- 24.Herdman, M., Gudex, C., Lloyd, A., Janssen, M., Kind, P., Parkin, D., et al. (2011). Development and preliminary testing of the new five-level version of EQ-5D (EQ-5D-5L). Quality of Life Research : An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation, 20, 1727–1736.CrossRefGoogle Scholar
- 25.Jakubczyk, M. (2009). Impact of complementarity and heterogeneity on health-related utility of life. Central European Journal of Economic Modeling and Econometrics, 1, 139–156.Google Scholar
- 27.Matza, L., Boye, K., Feeny, D., Johnston, J., Bowman, L., & Jordan, J. (2014). Impact of caregiver and parenting status on time trade-off and standard gamble utility scores for health state descriptions. Health and Quality of Life Outcomes, 12, 48. doi: 10.1186/1477-7525-12-48.CrossRefPubMedPubMedCentralGoogle Scholar
- 35.Sterba, K., Burris, J., Heiney, S., Ruppel, M., Ford, M., & Zapka, J. (2014). “We both just trusted and leaned on the Lord”: A qualitative study of religiousness and spirituality among African American breast cancer survivors and their caregivers. Quality of Life Research, 23, 1909–1920.CrossRefPubMedPubMedCentralGoogle Scholar
- 36.Wee, H. L., Li, S. C., Xie, F., Zhang, X. H., Luo, N., Feeny, D., et al. (2008). Validity, feasibility and acceptability of time trade-off and standard gamble assessments in health valuation studies: A study in a multiethnic Asian population in Singapore. Value in Health, 11, S3–S10.CrossRefPubMedGoogle Scholar