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Women With Gestational Diabetes At Risk Of Type 2 Diabetes

Date:
July 29, 2008
Source:
Canadian Medical Association Journal
Summary:
Women with gestational diabetes are at greater risk of developing type 2 diabetes, with almost 20 percent of women developing the condition within 9 years of pregnancy, found a large, population-based study of 659,000 women published in CMAJ.

Women with gestational diabetes are at greater risk of developing type 2diabetes, with almost 20% of women developing the condition within 9 years of pregnancy, found a large, population-based study of 659,000women published in the Canadian Medical Association Journal.

The study, conducted by a group of researchers from the University of Toronto, Mount Sinai Hospital and the Institute for Clinical and Evaluative Sciences, looked at 21,823women diagnosed with gestational diabetes and examined follow up records up to 9years. They found the rate of diabetes increased rapidly in the first 9months after delivery, peaking at 9years.

"In this large, population-based study, we found that diabetes developed within 9years after the index pregnancy in 18.9% of women with previous gestational diabetes; this rate was much higher than the rate among women without gestational diabetes (2%)," state Dr. Denice Feig and coauthors.

As well, they note that the rate of gestational diabetes in Ontario, the study province, seems to be increasing and is linked to older mothers. Living in low-income neighbourhoods and in urban areas were also risk factors for gestational diabetes. Higher urban statistics "may reflect the large numbers of South and East Asian and black populations living in urban areas, who have a higher risk of type 2diabetes," postulate Dr. Feig and colleagues.

"The main strength of our study lies in the fact that it was a large population-based study involving more than 21,000women with gestational diabetes, with up to 9years of follow-up," state the researchers. "Unlike other studies, it covered a large, well-defined geographic region with a population of 13million, which allowed us to make a more robust assessment of the risk of type 2 diabetes after gestational diabetes than has been possible in previous studies."

However, the study could not "assess the effect of ethnicity, obesity and level of fasting glucose during pregnancy, risk factors that are clearly associated with the development of diabetes."

"These women may benefit from both preventative interventions and regular screening," conclude the researchers who point out that physicians and policy makers need to counsel and screen these women accordingly.

In a related commentary, Dr. David Simmons of Cambridge University Hospitals NHS Foundation in the UK comments that many women with gestational diabetes become pregnant again, leading to potential risks for the fetus. "Type 2diabetes in pregnancy, particularly if previously undiagnosed, is associated with poor outcomes, including an increased incidence of fetal loss, malformation and perinatal death." He argues for more investment in prevention and screening programs for at-risk women to protect women and their future children.


Story Source:

The above story is based on materials provided by Canadian Medical Association Journal. Note: Materials may be edited for content and length.


Cite This Page:

Canadian Medical Association Journal. "Women With Gestational Diabetes At Risk Of Type 2 Diabetes." ScienceDaily. ScienceDaily, 29 July 2008. <www.sciencedaily.com/releases/2008/07/080728192649.htm>.
Canadian Medical Association Journal. (2008, July 29). Women With Gestational Diabetes At Risk Of Type 2 Diabetes. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2008/07/080728192649.htm
Canadian Medical Association Journal. "Women With Gestational Diabetes At Risk Of Type 2 Diabetes." ScienceDaily. www.sciencedaily.com/releases/2008/07/080728192649.htm (accessed July 28, 2014).

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