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  • High blood sugar...

High blood sugar before pregnancy tied to maternal death in non diabetics also

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2020-05-22T22:00:23+05:30  |  Updated On 2020-05-23T05:07:07+05:30
High blood sugar before pregnancy tied to maternal death in non diabetics also

Diabetes mellitus and obesity are both associated with adverse pregnancy outcomes but the relation between prepregnancy average blood sugar concentration and a woman's risk of severe maternal morbidity (SMM) is unknownDr Joel Ray of ICES and the University of Toronto, Canada, and colleagues have found that an elevated pre-pregnancy hemoglobin A1c--which measures average blood...

Diabetes mellitus and obesity are both associated with adverse pregnancy outcomes but the relation between prepregnancy average blood sugar concentration and a woman's risk of severe maternal morbidity (SMM) is unknown

Dr Joel Ray of ICES and the University of Toronto, Canada, and colleagues have found that an elevated pre-pregnancy hemoglobin A1c--which measures average blood sugar concentration--is associated with a higher risk of adverse pregnancy outcomes even in women without known diabetes.The new study has been published this week in PLOS Medicine .

These findings underscore the importance of a healthy diet and lifestyle before pregnancy, and call attention to the value of identifying women with varying degrees of high blood sugar before pregnancy.

The researchers in the current study evaluated whether an elevated preconception hemoglobin A1c (A1c) and blood sugar is associated with severe maternal morbidity or maternal death among women with and without known prepregnancy diabetes mellitus (DM).

In the new study, researchers used data from the Canadian province of Ontario spanning 2007 through 2015. The study included data on 31,225 women aged 16 through 50 years with a hospital live birth or stillbirth and who had an A1c measured within 90 days before conception. 28,075 of the women (90%) did not have a known diagnosis of diabetes mellitus.

Overall, the risk of severe maternal morbidity (SMM) or death from 23 weeks gestation to 6 weeks postpartum was 2.2%. For each 0.5% absolute increase in A1c, the relative risk of SMM or death was 1.16 (95% CI 1.14-1.19, p<0.001) after adjusting for maternal age, multifetal pregnancy, world region of origin, and tobacco/drug dependence. Compared to those with a healthy preconception A1c (below 5.8%), the adjusted relative risk of SMM or death was 1.31 (95% CI 1.06-1.62, p=0.01) in those with a preconception A1c of 5.8-6.4% and 2.84 (95% CI 2.31-3.49, p<0.001) in those with a preconception A1c greater than 6.4%. Among women without a diagnosis of diabetes who had an A1c over 6.4%, the adjusted relative risk was 3.25 (95% CI 1.76-6.00, p<0.001).

The authors note that most women do not undergo A1c testing, which may have led to selection bias among the cohort. Additionally, pre-pregnancy body mass index was unknown for 77% of the participants. Therefore, the potential interaction between BMI, A1c and risk of SMM should be investigated further. Still, these findings have implications for pre-pregnancy health screening.

"Given its convenient and widespread use, A1c testing may identify those women with preexisting diabetes mellitus at risk of severe maternal mortality, in a manner similar to its current use in recognizing those at higher risk of fetal anomalies, preterm birth and pre-eclampsia," the authors say. "As there is no current recommendation about A1c testing in nondiabetic pregnant women, especially those with obesity and/or chronic hypertension, our findings may enhance research about the benefits of A1c screening in these women."

For further reference log on to: Davidson AJF, Park AL, Berger H, Aoyama K, Harel Z, Cook JL, et al. (2020) Risk of severe maternal morbidity or death in relation to elevated hemoglobin A1c preconception, and in early pregnancy: A population-based cohort study. PLoS Med 17(5): e1003104.https://doi.org/10.1371/journal.pmed.1003104

preconception blood sugar blood sugar diabetes high blood sugar mortality before pregnancy glycated hemoglobin 
Source : PLOS Medicine
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Before Joining Medical Dialogues, he has served at important positions in the medical industry in India including as the Hony. Secretary of the Delhi Medical Association as well as the chairman of Anti-Quackery Committee in Delhi and worked with other Medical Councils in India. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

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