Cooper S, Lewis S, Thornton JG, Marlow N, Watts K, Britton J, et al. The SNAP trial: a randomized placebo- controlled trial of nicotine replacement therapy in pregnancy - clinical effectiveness and safety until 2 years after delivery, with economic evaluation. Health Technology Assessment 2014;18(54):1–128.
Intervention Components (click on component to see a list of all articles that use that intervention): PATIENT/CONSUMER
Pharmacotherapy (Nicotine)
Intervention Description: Nicotine replacement therapy (NRT) is effective for cessation outside pregnancy but efficacy and safety in pregnancy are unknown. We hypothesised that NRT would increase smoking cessation in pregnancy without adversely affecting infants.
Intervention Results: Smoking outcomes: at delivery, the validated, prolonged smoking cessation rate was 9.4% in the NRT and 7.6% in the placebo group (OR for cessation with NRT 1.26, 95% CI 0.82 to 1.96). At 1 month, the validated cessation rate was significantly higher in the NRT group (21.3% vs. 11.7%, OR for cessation with NRT 2.05, 95% CI 1.46 to 2.88). After delivery, there were no statistically significant differences in cessation. Self-reported prolonged abstinence since the quit date was: at 6 months, 5.4% in the NRT group and 3.2% in the placebo group; at 1 year, 3.7% and 2.1%; and, at 2 years, 2.9% and 1.7%, respectively.
Conclusion: Nicotine replacement therapy patches had no enduring, significant effect on smoking in pregnancy; however, 2-year-olds born to women who used NRT were more likely to have survived without any developmental impairment. Further studies should investigate the clinical effectiveness and safety of higher doses of NRT.
Study Design: Double-blind, randomized, placebo-controlled trial
Setting: Community (antenatal clinic)
Population of Focus: Pregnant women who smoked
Data Source: Caregiver self-reported, prolonged abstinence from smoking between a quit date and childbirth, validated at delivery by CO measurement and/or salivary cotinine (COT).
Sample Size: 1050 smoking 12- to 24-week pregnant women who currently smoke 5 or more cigarettes/d who smoked at least 10 cigarettes/d before pregnancy
Age Range: Not specified
Access Abstract