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Diabetes Care 25:1886, 2002
© 2002 by the American Diabetes Association, Inc.

Letters: Observations
Letter

Birthweight and Risk for Diabetes

Richard X. Davey, MD

1 From the Pathology Division, Western Hospital, Footscray, Victoria, Australia

Four independent studies, three in the U.S. and one in Norway, have recently examined 254,481 persons to find a relationship between each individual’s own birth weight and his or her risk of subsequently developing diabetes (1–4). The first two studies used type 2 diabetes as the sought end point; the second two focused on gestational diabetes. The occurrence of diabetes in a pregnant woman is in itself a marker for a heightened risk of subsequently developing frank diabetes, usually type 2. Table 1 shows the relative risk (RR) of subsequently developing diabetes at or below each designated birth weight; data are shown as RR (95% CI). Birth weights that were originally published in Imperial units have been converted to SI units.


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  		Table 1— Birthweight and risk for diabetes in the given person

 
While none of these observations can in themselves answer questions of causation, nonetheless the RR ratios found in the four studies are remarkably uniform and highly predictive.

None of these studies has identified a statistically significant increase in risk associated with birth weight greater than expected, but together they establish beyond all reasonable doubt that being small for gestational age at birth increases one’s risk of developing diabetes later in life. Moreover, they suggest that the smaller one begins life, the more likely one will be diabetic at its end.

Footnotes

Address correspondence to Dr. Richard X. Davey, Pathology Division, Western Hospital, Gordon Street, Footscray, Victoria 3011 Australia. E-mail: richard.davey{at}wh.org.au.

References

  1. Rich-Edwards JW, Colditz GA, Stampfer MJ, Willett WC, Gillman MW, Hennekens CH, Speizer FE, Manson JE: Birthweight and the risk for type 2 diabetes mellitus in adult women. Ann Intern Med 130: 278–284, 1999
  2. Curhan GC, Willett WC, Rimm EB, Spiegelman D, Ascherio AL, Stampfer MJ: Birth weight and adult hypertension, diabetes mellitus, and obesity in US men. Circulation 94: 3246–3250, 1996[Abstract/Free Full Text]
  3. Egeland GM, Skjærven R, Irgens LM: Birth characteristics of women who develop gestational diabetes: population based study. BMJ 321: 546–547, 2000[Free Full Text]
  4. Innes KE, Byers TE, Marshall JA, Baron A, Orleans M, Hamman RF: Association of a woman’s own birth weight with subsequent risk for gestational diabetes. JAMA 287: 2534–2541, 2002[Abstract/Free Full Text]

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This Article
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