Introduction

There is limited information about longitudinal patterns of vaping during pregnancy and the postpartum. We describe the prevalence, frequency, and reasons for vaping throughout pregnancy and postpartum. We also describe temporal patterns in pregnant women’s vaping.

Methods

A longitudinal cohort study across England and Scotland, with questionnaires in early pregnancy (8–24 weeks gestation), late pregnancy (34–38 weeks) and 3 months postpartum. A total of 750 women, aged 16 years or over, who were either current smokers, vapers or had smoked in the 3 months before pregnancy, were recruited between June and November 2017.

Results

Vaping prevalence was 15.9% (n = 119/750) in early pregnancy: 12.4% (n = 93/750) were dual users and 3.5% (n = 26/750) exclusive vapers. Late pregnancy vaping prevalence was 17.8% (n = 68/383): 12.5% (n = 48/383) were dual users and 5.2% (n = 20/383) exclusive vapers. Postpartum vaping prevalence was 23.1% (n = 95/411): 14.6% (n = 60/411) were dual users and 8.5% (n = 35/411) exclusive vapers. The most frequently reported reason to vape among all vapers was to quit smoking. A total of 316 women completed all three surveys: 2.6% (n = 8/316) were exclusive vapers in early pregnancy with most remaining exclusive vapers postpartum (n = 6/8, 75%). Of the 11.5% (n = 35/316) dual users in early pregnancy, 31.4% (n = 11/35) were exclusive smokers by the postpartum.

Conclusion

Vaping prevalence was between 15.9% and 23.1% during pregnancy and the postpartum period, and the majority were dual users. Vaping habits of exclusive vapers remains stable throughout pregnancy and the postpartum. However, the vaping habits of dual users varies, with a third exclusively smoking in the postpartum.

中文翻译：

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怀孕期间和产后吸烟和电子烟模式：一项英国纵向队列调查

 介绍

关于怀孕期间和产后电子烟纵向模式的信息有限。我们描述了整个怀孕和产后吸电子烟的流行率、频率和原因。我们还描述了孕妇吸电子烟的时间模式。

 方法

一项横跨英格兰和苏格兰的纵向队列研究，在妊娠早期（妊娠 8-24 周）、妊娠晚期（34-38 周）和产后 3 个月进行问卷调查。 2017 年 6 月至 11 月期间，总共招募了 750 名 16 岁或以上的女性，她们要么是当前吸烟者、电子烟使用者，要么是在怀孕前 3 个月内吸烟过。

 结果

怀孕早期电子烟流行率为 15.9% (n = 119/750)：12.4% (n = 93/750) 为双重使用者，3.5% (n = 26/750) 为单一电子烟使用者。妊娠晚期电子烟流行率为 17.8% (n = 68/383)：12.5% (n = 48/383) 为双重使用者，5.2% (n = 20/383) 为单一电子烟使用者。产后电子烟流行率为 23.1% (n = 95/411)：14.6% (n = 60/411) 为双重使用者，8.5% (n = 35/411) 为单一电子烟使用者。所有电子烟爱好者中最常报道的电子烟原因是戒烟。共有 316 名女性完成了所有三项调查：2.6%（n = 8/316）在怀孕早期是唯一的电子烟用户，其余大多数是产后的唯一电子烟用户（n = 6/8，75%）。在 11.5% (n = 35/316) 怀孕早期双重吸烟者中，31.4% (n = 11/35) 到产后是完全吸烟者。

 结论

怀孕期间和产后期间吸电子烟的比例在 15.9% 至 23.1% 之间，并且大多数是双重使用者。独家电子烟用户的电子烟习惯在整个怀孕期间和产后保持稳定。然而，双重使用者的电子烟习惯各不相同，三分之一的人只在产后吸烟。