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Pregnant smokers may face increased sudden infant death risk

Wednesday, March 13, 2019

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NEW US research has found that smoking before and during pregnancy could increase the risk of sudden unexpected infant death (SUID), which occurs in infants under the age of one.

Carried out by researchers at Seattle Children's Research Institute and Microsoft data scientists, the new study looked at data on 20,685,463 US births between 2007 and 2011, including 19,127 cases of SUID.

The researchers at AI For Good Research Lab at Microsoft used Microsoft Artificial Intelligence (AI) technology to analyse the mothers' cigarette smoking habits for all of the births included in the study.

“Using AI, we built machine learning models that analysed millions of pieces of data on child births and deaths, including mothers' smoking histories, allowing us to do something that was not done before: assess the impact that each additional cigarette has on SUID at this level of granularity,” explained one of the study's co-authors, Juan Lavista.

The findings, published in the journal Paediatrics, showed any amount of smoking — even just one cigarette a day — appeared to double the risk of SUID.

In addition, for women who smoked an average of one to 20 cigarettes a day, the risk of SUID increased as the number of cigarettes smoked also increased, however, the association plateaued after 20 cigarettes a day.

However, the good news is that women who reduced their smoking by the third trimester benefited from a 12 per cent reduction in the risk of SUID compared with those who continued smoking, and those who quit smoking altogether saw a 23 per cent reduction in risk.

“With this information, doctors can better counsel pregnant women about their smoking habits, knowing that the number of cigarettes smoked daily during pregnancy significantly impacts the risk for SUID,” said lead author Tatiana Anderson.

“Similar to public health campaigns that educated parents about the importance of infant sleep position, leading to a 50 per cent decrease in sudden infant death syndrome (SIDS) rates, we hope advising women about this risk will result in fewer babies dying from these tragic causes.”

Anderson added that if no women smoked during pregnancy, the researchers the current SUID rates could be lowered by 22 per cent.

“The most important takeaway is for women to understand that quitting smoking before and during pregnancy by far results in the greatest reduction in SUID risk,” she said.

“For pregnant women unable to quit entirely, every cigarette they can eliminate will reduce the odds of their child dying suddenly and unexpectedly from SUID,” says Anderson.


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