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Quitting smoking in pregnancy.

R A Walsh¹, J B Lowe, P J Hopkins

¹Cancer Education Research Program, NSW Cancer Council, Wallsend.

The Medical Journal of Australia

|October 23, 2001

Summary

Smoking during pregnancy significantly increases risks for low-birthweight babies and perinatal mortality. Interventions can improve quit rates, but reducing smoking by 50% is crucial if complete cessation isn't possible.

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Area of Science:

Obstetrics and Gynecology
Public Health
Addiction Medicine

Background:

Maternal smoking is a significant risk factor for adverse pregnancy outcomes, including low birth weight (mean reduction of 200g) and increased perinatal mortality.
Existing antenatal interventions by healthcare providers to reduce smoking rates in pregnant women are often inadequate.
The efficacy of nicotine replacement therapy (NRT) in pregnancy is not well-established.

Purpose of the Study:

To evaluate the effectiveness of smoking cessation interventions during pregnancy.
To determine the impact of smoking reduction versus abstinence on maternal and infant health.
To assess the role of healthcare providers and NRT in antenatal smoking cessation.

Main Methods:

Review of high-quality interventions for pregnant smokers.
Analysis of quit rates and impact of smoking reduction.
Evaluation of healthcare provider performance and NRT efficacy in pregnancy.

Main Results:

High-quality interventions yield an 8.1% absolute difference in validated late-pregnancy quit rates.
A 50% reduction in smoking may be the minimum threshold for maternal and infant health benefits if abstinence is not achieved.
Midwives demonstrate higher intervention rates than doctors; NRT is conditionally recommended for heavy smokers motivated to quit.

Conclusions:

Effective interventions are available to help pregnant women quit smoking, though healthcare provider performance needs improvement.
Reducing smoking by 50% is a viable alternative to complete cessation for mitigating health risks.
Careful consideration and motivation are key for NRT use in specific high-risk pregnant smokers.

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