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Authors
Whincup, Peter HKaye, Samantha J
Owen, Christopher G
Huxley, Rachel
Cook, Derek G
Anazawa, Sonoko
Barrett-Connor, Elizabeth
Bhargava, Santosh K
Birgisdottir, Bryndís E
Carlsson, Sofia
de Rooij, Susanne R
Dyck, Roland F
Eriksson, Johan G
Falkner, Bonita
Fall, Caroline
Forsén, Tom
Grill, Valdemar
Gudnason, Vilmundur
Hulman, Sonia
Hyppönen, Elina
Jeffreys, Mona
Lawlor, Debbie A
Leon, David A
Minami, Junichi
Mishra, Gita
Osmond, Clive
Power, Chris
Rich-Edwards, Janet W
Roseboom, Tessa J
Sachdev, Harshpal Singh
Syddall, Holly
Thorsdottir, Inga
Vanhala, Mauno
Wadsworth, Michael
Yarbrough, Donald E
Issue Date
2008-12-24
Metadata
Show full item recordCitation
JAMA. 2008, 300(24):2886-97Abstract
CONTEXT: Low birth weight is implicated as a risk factor for type 2 diabetes. However, the strength, consistency, independence, and shape of the association have not been systematically examined. OBJECTIVE: To conduct a quantitative systematic review examining published evidence on the association of birth weight and type 2 diabetes in adults. Data Sources and STUDY SELECTION: Relevant studies published by June 2008 were identified through literature searches using EMBASE (from 1980), MEDLINE (from 1950), and Web of Science (from 1980), with a combination of text words and Medical Subject Headings. Studies with either quantitative or qualitative estimates of the association between birth weight and type 2 diabetes were included. DATA EXTRACTION: Estimates of association (odds ratio [OR] per kilogram of increase in birth weight) were obtained from authors or from published reports in models that allowed the effects of adjustment (for body mass index and socioeconomic status) and the effects of exclusion (for macrosomia and maternal diabetes) to be examined. Estimates were pooled using random-effects models, allowing for the possibility that true associations differed between populations. DATA SYNTHESIS: Of 327 reports identified, 31 were found to be relevant. Data were obtained from 30 of these reports (31 populations; 6090 diabetes cases; 152 084 individuals). Inverse birth weight-type 2 diabetes associations were observed in 23 populations (9 of which were statistically significant) and positive associations were found in 8 (2 of which were statistically significant). Appreciable heterogeneity between populations (I(2) = 66%; 95% confidence interval [CI], 51%-77%) was largely explained by positive associations in 2 native North American populations with high prevalences of maternal diabetes and in 1 other population of young adults. In the remaining 28 populations, the pooled OR of type 2 diabetes, adjusted for age and sex, was 0.75 (95% CI, 0.70-0.81) per kilogram. The shape of the birth weight-type 2 diabetes association was strongly graded, particularly at birth weights of 3 kg or less. Adjustment for current body mass index slightly strengthened the association (OR, 0.76 [95% CI, 0.70-0.82] before adjustment and 0.70 [95% CI, 0.65-0.76] after adjustment). Adjustment for socioeconomic status did not materially affect the association (OR, 0.77 [95% CI, 0.70-0.84] before adjustment and 0.78 [95% CI, 0.72-0.84] after adjustment). There was no strong evidence of publication or small study bias. CONCLUSION: In most populations studied, birth weight was inversely related to type 2 diabetes risk.Description
To access publisher full text version of this article. Please click on the hyperlink in Additional Links fieldAdditional Links
http://jama.ama-assn.org/cgi/content/abstract/300/24/2886ae974a485f413a2113503eed53cd6c53
10.1001/jama.2008.886
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