Maternal Glucose Levels Linked to Two CHD Phenotypes

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Maternal Glucose Levels Linked to Two CHD Phenotypes
Maternal Glucose Levels Linked to Two CHD Phenotypes

TUESDAY, Oct. 13, 2015 (HealthDay News) -- Maternal midpregnancy measures of glucose and insulin are associated with two different congenital heart disease (CHD) phenotypes, according to a study published online Oct. 12 in JAMA Pediatrics.

James R. Priest, M.D., from the Stanford Cardiovascular Institute in California, and colleagues examined the potential correlation of two different CHD phenotypes in offspring with maternal midpregnancy measures of glucose and insulin. Data were included from 277 pregnant women carrying infants with tetralogy of Fallot (TOF; n = 55), infants with dextrotransposition of the great arteries (dTGA; n = 42), and healthy infants without CHD (n = 180).

The researchers found that maternal samples for offspring with TOF had elevated serum glucose values relative to controls (P = 0.01); this was not seen in maternal samples for offspring with dTGA relative to controls (P = 0.18). There was a significant difference between serum insulin levels in controls versus offspring with dTGA (P = 0.048) but not TOF (P = 0.35). In models including insulin, maternal blood glucose levels correlated strongly with odds of TOF (adjusted odds ratio, 7.54; 95 percent confidence interval, 2.3 to 24.69) but not dTGA (adjusted odds ratio, 1.16; 95 percent confidence interval, 0.28 to 4.79) relative to maternal blood glucose levels of infants without cardiac malformations.

"These results represent a direct correlation of glucose as a continuous variable to odds of specific cardiac malformations," the authors write.

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