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Hypertensive disorders of pregnancy tied to risk of cognitive decline later: Study

Written By : Dr. Kamal Kant Kohli Published On 2023-03-21T20:00:44+05:30  |  Updated On 21 March 2023 8:00 PM IST
Hypertensive disorders of pregnancy tied to risk of cognitive decline later: Study
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USA: Women with a history of hypertensive disorders of pregnancy (HDP), especially preeclampsia/eclampsia, are at higher risk of cognitive decline in later life, a recent study has pointed out. The study was published on March 1, 2023, in the online issue of Neurology, the American Academy of Neurology medical journal.

The study showed that high blood pressure disorders during pregnancy are linked to an increased risk of thinking problems later in life. Researchers found that those with these disorders had a higher risk of cognitive problems in later life than those who did not have high blood pressure during pregnancy.

They also found that those with preeclampsia, which is high blood pressure that develops halfway through pregnancy and usually involves the kidneys and other organs, may have an even greater risk of cognitive decline later in life compared to those with gestational high blood pressure, a condition with high blood pressure in pregnancy but without affecting the kidneys or other organs.

“While high blood pressure during pregnancy, including preeclampsia, is recognized as a risk factor for heart disease and stroke, our study suggests that it may also be a risk factor for cognitive decline in later life,” said study author Michelle M. Mielke, PhD, of Wake Forest University School of Medicine in Winston-Salem, North Carolina, and a member of the American Academy of Neurology.

The study involved 2,239 female participants with an average age of 73. Researchers looked at medical records for information about previous pregnancies.

Of the participants, 1,854 people or 83% had at least one pregnancy, and 385 people or 17% never had a pregnancy or had a pregnancy of less than 20 weeks. Of those with pregnancies longer than 20 weeks, 100 had gestational high blood pressure, 147 had preeclampsia or eclampsia and 1,607 had normal blood pressure. Preeclampsia is when there is excess protein in the urine during pregnancy. Eclampsia is when high blood pressure during pregnancy causes one or more seizures, sometimes followed by a coma.

For the study, participants took nine memory and thinking tests every 15 months over an average of five years. The tests measured thinking and memory skills, including global cognition, processing speed, executive function, language and visual perception.

Overall, researchers found that those with high blood pressure during pregnancy had a greater decline than those without high blood pressure during pregnancy and those without birth on tests of global cognition, attention, executive function and language.

After adjusting for age and education, the average composite score of all memory and thinking tests of participants with any high blood pressure disorder declined by 0.3 points compared to those who did not have high blood pressure during pregnancy, with a decline of 0.05 points. When looking at different types of high blood pressure disorders, those with preeclampsia had a decline of 0.04 points compared to those with other blood pressure disorders and those with no blood pressure disorders, which both had a decline of 0.05.

After adjusting for age and education, those with high blood pressure in pregnancy declined 0.4 standard deviation over five years on tests of executive function and attention, compared to those with normal blood pressure for all pregnancies and declined only 0.1 standard deviations. These results were more pronounced for preeclampsia, with a 0.5 standard deviation decrease on tests of executive function and attention compared to a 0.1 decrease for those who had normal blood pressure for all pregnancies.

“More research is needed to confirm our findings. However, these results suggest that managing and monitoring blood pressure during and after pregnancy is important for brain health later in life,” Mielke said.


NeurologyAmerican Academy of NeurologyHigh blood pressurepregnancyheart disease
Source : Neurology
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. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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