Published online by Cambridge University Press: 08 August 2009
Introduction
Epidemiological studies have contributed enormously to our understanding of the natural history of many non-communicable diseases like coronary heart disease (CHD) and type 2 diabetes. Although clinical manifestations of these conditions normally become evident in adult life, early signs are recognisable already in children (Holman et al. 1958, Strong and McGill 1962, Berenson et al. 1979). A greater understanding of the evolution of many chronic diseases and their risk factors early in life is important for their primary prevention as well as in order to get a better understanding of the disease pathogenesis. The discovery that people who develop CHD and many of its risk factors in adult life grow differently during early life has led to the recognition of new developmental models for the disease and its risk factors. In this chapter, patterns of growth will be focused upon primarily in relation to CHD and type 2 diabetes as disease outcomes.
Prenatal growth
David Barker proposed that the epidemic of CHD in Western countries might have its origin in fetal life. He observed that areas in the UK with the highest rates of neonatal mortality in the 1910s and 1920s had the highest rates of CHD in the 1970s and 1980s. Based on these observations he postulated that impaired fetal growth predisposes to heart disease in adult life; studies in Hertfordshire, UK, proved the hypothesis to be correct (Osmond et al. 1993).
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