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Health Impact Index. Development and Validation of a Method for Classifying Comorbid Disease Measured against Self-Reported Health

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  • Geir Fagerjord Lorem
  • Henrik Schirmer
  • Nina Emaus

Abstract

The objective of this study was to develop a method of classifying comorbid conditions that accounts for both the severity and joint effects of the diseases. The Tromsø Study is a cohort study with a longitudinal design utilizing a survey approach with physical examinations in the Tromsø municipality from 1974 to 2008, where in total 40051 subjects participated. We used Tromsø 4 as reference population and the Norwegian Institute of Public Health (FHI) panel as validation population. Ordinal regression was used to assess the effect of comorbid disease on Self-Reported Health (SRH). The model is controlled for interaction between diseases, mental health, age, and gender. The health impact index estimated levels of SRH. The comparison of predicted and observed SRH showed no significant differences. Spearman’s correlation showed that increasing levels of comorbidity were related to lower levels of SRH (RS = -0.36, p

Suggested Citation

  • Geir Fagerjord Lorem & Henrik Schirmer & Nina Emaus, 2016. "Health Impact Index. Development and Validation of a Method for Classifying Comorbid Disease Measured against Self-Reported Health," PLOS ONE, Public Library of Science, vol. 11(2), pages 1-14, February.
    • Handle: RePEc:plo:pone00:0148830
    DOI: 10.1371/journal.pone.0148830
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    3. Shetterly, S.M. & Baxter, J. & Mason, L.D. & Hamman, R.F., 1996. "Self-rated health among hispanic vs non-hispanic white adults: The San Luis Valley health and aging study," American Journal of Public Health, American Public Health Association, vol. 86(12), pages 1798-1801.
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