Stopping Smoking Early in Pregnancy Cuts Risk of Preterm Birth
[MedPage Today, 4/19/19] But just 1 in 4 women who smoked before pregnancy quit prior to giving birth.
Smoking cessation during pregnancy, especially in the first trimester, was associated with a decreased risk for preterm birth,
an analysis of over 25 million live births found.
In a light-smoking, 25-to 29-year-old white woman, for example, the probability of a preterm birth was 9.8% if she continued smoking throughout her pregnancy but dropped to 7.8% if she quit smoking at the start of her pregnancy (20.3% relative decrease), reported Samir Soneji, PhD, of Dartmouth Geisel School of Medicine in Lebanon, New Hampshire, and colleagues.
If these mothers-to-be stopped smoking at the start of the second trimester, the probability of preterm birth was 9.0% (8.9% relative decrease), they wrote in JAMA Network Open.
“We know that nationally the number of women who have started pregnancy as smokers has decreased substantially, and that is good news,”
said Soneji. “One concern in our findings, though, is that there doesn’t seem to be much progress in getting women to quit when they begin their pregnancies as smokers.”
As noted, the percentage of pre-pregnancy smokers who quit for their entire pregnancy did not change significantly during the period studied, 24.3% in 2011 and 24.6% in 2017. Meanwhile, 14.5% of women in 2011 and 14.4% in 2017 quit after the first trimester and 39.5% and 39.7%, respectively, quit during the third trimester…….
Read the Full Article at: MedPage Today
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