Comparative vs global self-rated health: associations with age and functional ability
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Background and aims: This study examined the relationship of age and functional ability with comparative (age-referential) and global self-rated health (SRH), and the possible effect of selection bias. The focus is on differences between these questions and on the consequences which these differences have in research. Methods: The data came from the second wave of the Tampere Longitudinal Study on Ageing (TamELSA), consisting of 830 persons aged 60–99 years. The associations of both self-rated health measures with age and functional ability were examined using multinomial regression analyses. Results: People with increasing age, particularly over 80-year-old, are inclined to rate their health better than that of their age peers. The association of older age with better comparative SRH became even stronger after adjustment for functional ability, chronic diseases and sociodemographic factors. The relation of older age with global SRH was weaker than that with age-referential SRH. By contrast, functional ability was more strongly associated with global than with comparative SRH. Conclusions: Our results suggest that comparative and global self-rated health cannot be used interchangeably. The comparative measure is more strongly “calibrated” by age. Therefore, when SRH is used as a measure in survey studies or in clinical settings, the global question should be preferred.
Key wordsAge comparative self-rated health functional ability global self-rated health
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- 3.Benyamini Y, Leventhal E, Leventhal H. Self-assessments of health. What do people know that predicts their mortality? Res Aging 1999; 21: 477–500.Google Scholar
- 13.Jylhä M. Self-rated health in old age. Acta Universitatis Tam- perensis, Ser. A, Vol. 195, University of Tampere, 1985.Google Scholar
- 17.Jylha M, Guralnik JM, Balfour J, Fried LP. Walking difficulty, walking speed, and age as predictors of self-rated health: The Women’s Health and Aging Study. J Gerontol 2001; 56A: M609–17.Google Scholar
- 21.Tornstam L. Att aldras. Socialgerontologiska perspektiv. Up- sala, 1973.Google Scholar
- 22.Shanas E, Townsend P, Wedderburn D, Friis H, Milhoj P, Ste- houwer J. Old people in three industrial societies. London, Rout- ledge & Kegan Paul, 1968.Google Scholar
- 23.Heikkinen E, Waters E, Brzezinsky ZJ. The elderly in eleven countries. A sociomedical study. Series Public Health in Europe. Copenhagen, World Health Organization, 1983.Google Scholar
- 25.Jylhä M, Jokela J, Tolvanen E, et al. The Tampere Longitudinal Study on Ageing. Description of the study. Basic results on health and functional ability. Scan J Public Health 1992 (Suppl 47), University of Tampere.Google Scholar
- 26.Jylhä M, Jokela J, Heikkinen E. Health-related quality of life in the elderly in 1979 and 1989. A birth cohort comparison in Tampere, Finland. In Ferrucci L, Heikkinen E, Waters E, Baroni A, eds. Health and quality of life in older Europeans. Copenhagen: INRCA and WHO, 1995.Google Scholar