The PREP 2 study used data collected from over 1100 pregnant smokers attending 23 hospitals in England and 1 stop-smoking service in Scotland. It compared pregnancy outcomes in women who did or did not use nicotine in the form of e-cigarettes (EC) or nicotine patches regularly during their pregnancy.
Researchers took measurements of salivary cotinine levels at baseline and towards the end of pregnancy. Information was gathered about each participant’s use of cigarettes or types of NRT, respiratory symptoms, and the birth weight and other data of their babies at birth.
The study, published in Addiction Journal, found that e-cigarettes were more commonly used in the group studied than nicotine patches (47% compared with 21%).
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