- Ivan Berlin, associate professor of clinical pharmacology1,
- Noémi Berlin, researcher in behavioural economics2,
- Marie Malecot, vascular physician3,
- Martine Breton, midwife4,
- Florence Jusot, professor of economics5,
- Léontine Goldzahl, associate professor of economics6
- 1Département de pharmacologie, Hôpital Pitié-Salpêtrière-Sorbonne Université, 75013 Paris, France
- 2CNRS, EconomiX, Université Paris Nanterre, Nanterre, France
- 3Unité d’addictologie, Centre Hospitalier St Joseph St Luc, Lyon, France
- 4Centre Hospitalier Universitaire Morvan, Brest, France
- 5Université Paris-Dauphine, PSL-Research University, LEDa, Paris, France
- 6EDHEC Business School, Roubaix, France
- Correspondence to: I Berlin
- Accepted 10 November 2021
Objective To evaluate the efficacy of financial incentives dependent on continuous smoking abstinence on smoking cessation and birth outcomes among pregnant smokers.
Design Single blind, randomised controlled trial.
Setting Financial Incentive for Smoking Cessation in Pregnancy (FISCP) trial in 18 maternity wards in France.
Participants 460 pregnant smokers aged at least 18 years who smoked ≥5 cigarettes/day or ≥3 roll-your-own cigarettes/day and had a pregnancy gestation of <18 weeks were randomised to a financial incentives group (n=231) or a control group (n=229).
Interventions Participants in the financial incentives group received a voucher equivalent to €20 (£17; $23), and further progressively increasing vouchers at each study visit if they remained abstinent. Participants in the control group received no financial incentive for abstinence. All participants received a €20 show-up fee at each of six visits.
Main outcome measures The main outcome measure was continuous smoking abstinence from the first post-quit date visit to visit 6, before delivery. Secondary outcomes in the mothers were point prevalence abstinence, time to smoking relapse, withdrawal symptoms, blood pressure, and alcohol and cannabis use in past 30 days. Secondary outcomes in the babies were gestational age at …….