Diabetes Care 26:2005-2009, 2003
© 2003 by the American Diabetes Association, Inc.
Epidemiology/Health Services/Psychosocial Research Original Article |
Population Health Significance of Gestational Diabetes
N. Wah Cheung, PHD1 and
Karen Byth, PHD2
1 Department of Diabetes and Endocrinology, Westmead Hospital, University of Sydney, Sydney, Australia
2 Westmead Millennium Institute, University of Sydney, Sydney, Australia
Address correspondence and reprint requests to N. Wah Cheung, Department of Diabetes and Endocrinology, Westmead Hospital, Westmead, NSW 2145, Australia. E-mail: wah{at}westgate.wh.usyd.edu.au.
OBJECTIVEWomen who have had gestational diabetes mellitus (GDM) have a high risk of subsequently developing diabetes. However, the contribution of GDM toward the total population of people with diabetes, or its population health impact, has not been examined. Therefore, the aim of this study is to determine the population health significance of GDM by estimating the proportion of cases of diabetes in women that would have been preceded by a pregnancy complicated by GDM.
RESEARCH DESIGN AND METHODSA MEDLINE search was conducted to identify controlled follow-up studies of women with GDM. Meta-analysis of these studies, using the Mantel-Haenszel method for pooling relative risks (RRs), provided an overall RR for the development of diabetes in women with GDM versus control women who had been pregnant without GDM. Recent large studies examining the prevalence of GDM were also reviewed. This enabled the calculation of the population-attributable risk (PAR) for these populations. In this case, the PAR represents the proportion of cases of diabetes among parous women that were associated with previous GDM.
RESULTSFrom six controlled follow-up studies, the overall RR for developing diabetes after GDM was calculated to be 6.0 (95% CI 4.18.8). Applying this to the studies of GDM prevalence, the PAR for GDM ranged from 0.10 to 0.31 (i.e., 1031% of parous women with diabetes would have experienced a GDM pregnancy earlier).
CONCLUSIONSIn some populations, women who have had GDM comprise a substantial proportion of subjects who ultimately develop diabetes. Effective measures to prevent women with GDM from progressing to frank diabetes could therefore have a significant population health impact.
Abbreviations: ADIPS, Australasian Diabetes in Pregnancy GDM, gestational diabetes mellitus PAR, population-attributable risk USPHS, U.S. Public Health Service WHO, World Health Organization

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Copyright © 2003 by the American Diabetes Association.
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