From the Journals

GDM, subsequent diabetes predictive of later renal damage

 

Key clinical point: Gestational diabetes mellitus may be a risk factor for future development of renal damage.

Major finding: Women with previous GDM and a subsequent diagnosis of diabetes were over twice as likely to show evidence of existing renal damage.

Data source: The findings are based on 9-16 years of prospective follow-up of 607 women with and 619 women without a history of GDM.

Disclosures: The research was funded by the National Institute of Child Health and Human Development at the National Institutes of Health, the Innovation Fund Denmark, March of Dimes Birth Defects Foundation, Health Foundation, Heart Foundation and European Union. Coauthor Allan Vaag is an employee of AstraZeneca. No other authors had disclosures.

Source: Rawal S et al. Diabetes Care. 2018 May 4. doi: 10.2337/dc17-2629.


 

FROM DIABETES CARE

Women with a history of gestational diabetes mellitus who later develop diabetes had an elevated urinary albumin-to-creatinine ratio an average of 13 years later, indicating renal damage, according to a new study.

Those with a history of gestational diabetes mellitus (GDM) – but no subsequent development of diabetes – did not show an increased urinary albumin-to-creatinine ratio (UACR) but did have a higher estimated glomerular filtration rate (eGFR), hinting at early stages of glomerular hyperfiltration and renal damage.

“Our findings suggest that in women with a history of GDM, deterioration of renal function may potentially precede the development of overt diabetes, although clinically relevant outcomes such as elevated UACR may manifest only after progression to diabetes,” wrote Shristi Rawal, PhD, a postdoctoral fellow at the National Institute of Child Health and Human Development and her associates.

“These findings suggest that women with GDM-complicated pregnancies may represent a high-risk group that could benefit from regular monitoring for early-stage renal damage, timely detection of which may help clinicians initiate treatment to prevent or delay further disease progression,” they wrote.

The investigators compared outcomes among 1,226 Danish women 9-16 years after their index pregnancy during 1996-2002; a predominantly white study population, which limited the study’s generalizability to other demographic groups, the authors acknowledged. A total of 607 women had had GDM during their first pregnancy, 183 of whom developed type 1 or 2 diabetes. Of the 619 women who did not have GDM, 9 developed diabetes.

Serum creatinine and urinary albumin and creatinine measurements were taken to determine eGFR and UACR. Women with a previous GDM diagnosis had higher eGFR and UACR than women without previous GDM. The higher eGFR remained significant after adjustments for age at first pregnancy, completion of high school, smoking during pregnancy, a family history of diabetes, prepregnancy hypertension, and prepregnancy body mass index (BMI). UACR differences were not significant after adjustment.

Women with GDM and subsequent diabetes had a significantly higher UACR than women without either and had more than twice the risk of an elevated UACR of at least 20 mg/g (adjusted relative risk, 2.3), even after confounder adjustment.

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