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individual environment

Acta geneticae medicae et gemellologiae: twin research (1)

International Soc for Twin Studies (1)

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A Family Study of Developmental Effects upon Blood Pressure Variation
J. Sims, D. Carroll, J.K. Hewitt, J.R. Turner
Journal:

Acta geneticae medicae et gemellologiae: twin research / Volume 36 / Issue 4 / October 1987

Published online by Cambridge University Press:

01 August 2014, pp. 467-473

Print publication:

October 1987
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In an earlier study of blood pressure variation in middle aged parents and their young adult twin offspring, the greater blood pressure variation observed in the parent sample was accounted for in terms of an increasing influence of individual environmental experiences with increasing age and a commensurate reduction in the impact of heredity. In the present study, the sample size was enlarged to provide a more powerful test of these effects. Maximum likelihood model-fitting techniques were applied to blood pressure covariation in balanced pedigrees, consisting of 85 families (40 MZ and 45 DZ twin pairs). As before, our analysis indicated that a developmental effect was a salient factor in the older age group.