International Journal of Epidemiology 2003;32:78-82
© International Epidemiological Association 2003
Special Theme: Genetic Epidemiology |
The association between body height and coronary heart disease among Finnish twins and singletons
1 Division of Epidemiology, School of Public Health, University of Minnesota, USA.
2 Department of Public Health, University of Helsinki, Finland.
3 National Public Health Institute, Finland
4 Department of Public Health, University of Turku, Finland.
Correspondence: Second Street, Minneapolis, MN 55454–1015, USA. E-mail: silventoinen{at}epi.umn.edu
Objectives An inverse association between body height and the incidence of coronary heart disease (CHD) has been observed. However, the mechanisms behind this association are still largely unknown. We will examine the role of genetic and familial factors behind the association in a large twin data set.
Design and setting The data were derived from the Finnish Twin cohort including 2438 singletons, 4073 monozygotic (MZ) twins, and 9202 dizygotic (DZ) twins aged 25–69 years at baseline in 1976. Incident CHD cases were derived from hospital discharge data and cause of death data between 1977 and 1995. Cox regression analysis and conditional logistic regression analysis were used.
Results In population-level analyses no differences in the general risk of CHD between zygosity groups were found. The association between body height and CHD was similar between sexes and zygosity groups. When men and women in all zygosity groups were studied together an increased risk of CHD was found only among the shortest quartile (hazard ratio [HR] = 1.34, 95% CI: 1.14–1.57). Among the twin pairs discordant for CHD a suggestive increased risk for the shorter twin was seen among DZ twins (odds ratio [OR] = 1.19, 95% CI: 0.95–1.48) when men and women were studied together.
Conclusion An inverse association between body height and CHD was broadly similar between sexes and twin zygosity groups and was associated with short stature. Among discordant twin pairs we found a weak association among DZ twins but not MZ twins. This may suggest the role of genetic liability behind the association between body height and CHD.
Keywords Body height, genetic factors, coronary heart disease, follow-up studies, risk factors
Accepted 23 October 2002
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