This study explores age differences in the genetic and environmental influences that may mediate the relationship between life satisfaction and self-rated health. The participants are from the Swedish Adoption/Twin Study of Aging (SATSA), which includes 99 pairs of identical twins reared apart, 166 pairs of identical twins reared together, 238 pairs of fraternal twins reared apart, and 221 pairs of fraternal twins reared together. A mailed questionnaire included four items inquiring about perceived health and the 13-item shortened version of the Life Satisfaction Index, which yielded a general principal component for life satisfaction. Important age differences were found in the etiology of individual differences for each scale and in the factors that mediate the relationship between the measures. In the group younger than 65 years, the correlation between life satisfaction and perceived health can be explained entirely by environmental influences. For the group aged 65 and older, both genetic and environmental effects contribute substantially to the relationship. These age differences may reflect age-related changes, cohort effects, or both.
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References
1.
Adams, D. L. (1969). Analysis of a Life Satisfaction Index. Journal of Gerontology, 24, 470-474.
2.
Boomsma, D. I. , & Molenaar, P.C.M. (1986). Using LISREL to analyze genetic and environmental covariance structure. Behavior Genetics, 16, 237-250.
3.
Brody, J. A. , & Schneider, E. L. (1986). Diseases and disorders of aging: An hypothesis. Journal of Chronic Diseases, 39, 871-876.
4.
Carp, F. M. , & Carp, A. (1983). Structural stability of well-being factors across age and gender, and development of scales of well-being unbiased for age and gender. Journal of Gerontology, 38, 572-581.
5.
Duke University Center for the Study of Aging and Human Development . (1978). Multidimensional functional assessment: The OARS methodology. Durham, NC: Duke University Medical Center.
6.
Fries, J. F. (1980). Aging, natural death, and the compression of morbidity. New England Journal of Medicine, 303, 130-135.
7.
George L. K. , & Landerman, R. (1984). Health and subjective well-being: A replicated secondary data analysis. International Journal of Aging and Human Development, 19, 133-156.
8.
Harris, J. , Pedersen, N. L., McClearn, G. E., Plomin, R., & Nesselroade, J. (1992). Age differences in genetic and environmental influences for health from the Swedish Adoption/Twin Study of Aging. Journal of Gerontology, 47, P213-P220.
9.
Hoyt, D. R. , & Creech, J. C. (1983). The Life Satisfaction Index: a methodological and theoretical critique. Journal of Gerontology, 38, 111-116.
10.
Jöreskog, K. G. , & Sörbom, D. (1986). LISREL VI: Analysis of linear structural relationships by the method of maximum likelihood. Mooresville, IN: Scientific Software.
11.
Jylhä, M. , Leskinen, E., Alanen, E., Leskinen, A., & Heikkinen, E. (1986). Self-rated health and associated factors among men of different ages. Journal of Gerontology, 41, 710-717.
12.
Kaplan, G. , Barrell, V., & Lusky, A. (1988). Subjective state of health and survival in elderly adults. Journal of Gerontology, 43, S114-S120.
13.
Larson, R. (1978). Thirty years of research on the subjective well-being of older Americans. Journal of Gerontology, 33, 109-125.
14.
LaRue, A. , Bank, L., Jarvik, L., & Hetland, M. (1979). Health in old age: How do physicians' and self-ratings compare?Journal of Gerontology, 34687-691.
15.
Liang, J. , Van Tran, T., & Markides, K. S. (1988). Differences in the structure of Life Satisfaction Index in three generations of Mexican Americans. Journal of Gerontology, 43, S1-S8.
16.
Martin, N. G. , & Eaves, L. J. (1977). The genetical analysis of covariance structure. Heredity, 38, 79-95.
17.
McClearn, G. E. , Pedersen, N. L., Plomin, R., Nesselroade, J. R., Friberg, L., & DeFaire, U. (1991). Age and gender effects for individual differences in behavioral aging: The Swedish Adoption/Twin Study of Aging. Manuscript report of the Center for Developmental and Health Genetics, Pennsylvania State Univeristy.
18.
McGue, M. , & Bouchard, T. J. (1984). Adjustment of twin data for the effects of age and sex. Behavioral Genetics, 14, 325-343.
19.
Okun, M. A. , Stock, W. A., Haring, M. J., & Witter, R. A. (1984). Health and subjective well-being: A meta-analysis. International Journal of Aging and Human Development, 19, 111-132.
20.
Palmore, E. (Ed.). (1970). Normal aging. Durham, NC: Duke University Press.
21.
Palmore, E. (Ed.). (1974). Normal aging to. Durham, NC: Duke University Press.
22.
Pilpel, D. , Carmel, S., & Galinsky D. (1988). Self-rated health among the elderly. A comparative analysis of health status measures, leisure activities and social contacts in age/sex groups. Comprehensive Gerontology, 2, 110-116.
23.
Plomin, R. , & DeFries, J. C. (1979). Multivariate behavioral genetic analysis of twin data on scholastic abilities. Behavior Genetics, 9, 505-517.
24.
Plomin, R. , Pedersen, N. L., McClearn, G. E., Nesselroade, J. R., & Bergeman, C. S. (1988). Eas temperaments during the last half of the life span: Twins reared apart and twins reared together. Psychology and Aging, 3, 43-50.
25.
Rowe, J. W. (1985). Health care of the elderly. New England Journal of Medicine, 312, 827-835.
26.
Schneider, E. L. , & Brody, J. A. (1983). Aging, natural death, and the compression to morbidity: Another view. New England Journal of Medicine, 309, 854-856.
27.
Spreitzer, E. , & Snyder, E. E. (1974). Correlates of life satisfaction among the aged. Journal of Gerontology, 29, 454-458.
28.
Stock, W. A. , Okun, M. A., & Benin, M. (1986). Structure of subjective well-being among the elderly. Psychology and Aging, 2, 91-102.
29.
Wilson, G. A. , Elias, J. W., & Brownlee, L. J. (1985). Factor invariance and the Life Satisfaction Index. Journal of Gerontology, 40, 344-346.
30.
Wood, V. , Wylie, M. L., & Sheafor, B. (1969). An analysis of a short self-report measure of life satisfaction: Correlation with rater judgments. Journal of Gerontology, 24, 465-469.
31.
Zautra, A. , & Hempel, A. (1984). Subjective well-being and physical health: A narrative literature review with suggestions for future research. International Journal of Aging and Human Development, 19, 95-110.
