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Literature review for - Flourish Paediatrics

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Table 1 Death rates from coronary artery disease among 16 000 men and women born in<br />

Hert<strong>for</strong>dshire between 1911 and 1920, by birthweight<br />

Birthweight (pounds)<br />

Standardised<br />

mortality ratio<br />

Deaths<br />

(number)<br />

9.5 65 57<br />

All 74 941<br />

A more recent systematic <strong>review</strong> of similar studies has found a 25% decrease in diabetes risk <strong>for</strong> every<br />

one kg increase in weight at birthweight (Whincup, Kaye et al. 2008). However, this relationship only<br />

holds <strong>for</strong> what is regarded as the normal range of birthweights (2500- 4000 or 4500grams) with the<br />

association between birthweight and diabetes becoming positive at high birthweights (Yajnik 2010).<br />

The risk of macrosomia and metabolic syndrome has been well recognised.<br />

Barker’s original studies were criticized on the basis of confounding by social class or biased results<br />

from the relatively low follow-up rate may have resulted in biased results. Since that time, however, the<br />

results of other published studies have overcome these objections, with a large number of studies across<br />

different cultures with different endpoints strengthening the hypothesis. Most notable are the studies<br />

from Scandinavia, particularly Helsinki, where a comprehensive database and excellent follow-up have<br />

allowed <strong>for</strong> more detailed work (Forsén, Eriksson et al. 1999; Forsen, Eriksson et al. 2000; Barker,<br />

Osmond et al. 2009). The Finnish studies added to knowledge of how growth during infancy and<br />

childhood modifies health outcomes. The path of growth during childhood modifies the risk of disease<br />

associated with small body size at birth. The highest death rates from coronary heart disease were found<br />

in men who were thin at birth but who had accelerated growth rates during the first year of life, resulting<br />

in above average body mass at one year. Other confirmatory studies <strong>for</strong> the hypothesis have come from<br />

continuing analysis of the results of the famine in Holland during World War II (Roseboom, Van der<br />

448

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