The cessation in pregnancy incentives trial
| ISRCTN | ISRCTN87508788 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN87508788 |
| Protocol serial number | V17.1 |
| Sponsor | NHS Greater Glasgow and Clyde (UK) |
| Funders | Chief Scientist Office (CZH/4/594), Glasgow Centre for Population Health (UK), Director of Public Health Education and Research Endowment Fund Greater Glasgow & Clyde Health Board (UK), Yorkhill Children's Foundation (UK), Royal Samaritan Endowment Fund (UK) |
- Submission date
- 21/07/2011
- Registration date
- 01/09/2011
- Last edited
- 25/07/2017
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Mental and Behavioural Disorders
Plain English summary of protocol
Background and study aims
7 in 10 women have at least one baby, making pregnancy an opportunity to help most female smokers to quit before their own health is damaged. However less than 1 in 10 pregnant smokers make use of the offer of available support and only 1 in 30 smokers quit during pregnancy. Smoking can lead to:
1. 1 in 3 miscarriages and still births
2. Children who are less intelligent
3. Children who are more likely to have asthma
4. Children who have attention deficit hyperactivity disorder (ADHD)
5. Children who are more likely to develop cardiovascular disease as adults
Four trials in the USA have shown promising results and the use of incentives in Dundee, Scotland has led to an increase in the number of pregnant women accessing the smoking cessation (quit smoking) support available.
The results from this study will be used to design a larger study to confirm that financial incentives lead to increased uptake of smoking cessation services and/or more women quitting smoking during pregnancy. The larger study will also assess if the benefits to child and mother outweigh the extra cost of incentive voucher payments.
Who can participate?
All women who:
1. Self report as current smokers when routinely asked at maternity booking
2. Have a carbon monoxide breath test level greater than 6 parts per million
3. Are booked for maternity care in NHS Greater Glasgow and Clyde
What does the study involve?
This study will offer pregnant smokers:
1. Standard care (control group) which includes the offer of face to face support from a trained smoking cessation adviser followed by telephone support plus the offer of free nicotine replacement therapy (like nicotine gums, patches) provided by pharmacy services for up to 12 weeks to support a quit attempt.
2. Standard care plus the offer of voucher incentives (intervention group) to take part in cessation services and to quit. If smokers arrive for a face to face appointment with a cessation adviser and set a quit date they will receive £50. If they have not smoked 4 weeks later (confirmed by a breath test) they will receive £50 and a further £100 if they have not smoked after 12 weeks. If they have not smoked when they are 34 to 38 weeks pregnant / near the end of pregnancy (confirmed by urine test) they will receive a final payment of £200.
What are the possible benefits and risks of participating?
Benefits:
1. Up to £400 in monetary vouchers
2. £1000 savings on cigarettes plus the health benefits to the mother and her unborn baby
Risks:
There are no risks to the participants
Where is the study run from?
The study will take place in the West of Scotland, United Kingdom
When is study starting and how long is it expected to run for?
Approximate start date will be late 2011 and the study will last approximately 2 years
Who is funding the study?
1. Chief Scientist Office Scottish Government
2. Glasgow Centre for Population Health
3. Yorkhill Children's Foundation
4. Royal Samaritan Endowment Fund
5. Director of Public Health Research and Teaching Endowment Fund
Who is the main contact?
Professor David Tappin
david.tappin@Glasgow.ac.uk
Contact information
Scientific
PEACH Unit
8th Floor
Queen Mother's Tower Block
Yorkhill
Glasgow
G3 8SJ
United Kingdom
Study information
| Primary study design | Interventional |
|---|---|
| Study design | Phase II individually randomised parallel-group controlled trial |
| Secondary study design | Randomised controlled trial |
| Study type | Participant information sheet |
| Scientific title | The Cessation in Pregnancy Incentives Trial (CPIT): a phase II randomised controlled trial |
| Study acronym | CPIT |
| Study objectives | By offering financial incentives to pregnant smokers more will engage with smoking cessation services and more will quit smoking during pregnancy. |
| Ethics approval(s) | West of Scotland Research Ethics Committee 2, 25/05/2011, ref: 11/AL/0204 |
| Health condition(s) or problem(s) studied | Smoking addiction |
| Intervention | The intervention group: The offer of incentive payments for cessation during pregnancy will be delivered by the specially trained NHS Smoking Helpline staff towards the end of the second trial consent telephone contact call to participants who have been randomly allocated to the intervention group. A £50 store voucher will be sent by registered post if participants arrive for their first face to face appointment with the NHS Smokefree Pregnancy Service adviser and set a quit date; a further £50 voucher will be sent if they are self report abstinent 4 weeks after quit date corroborated by a routinely collected carbon monoxide breath test routinely taken by pharmacy services prior to dispensing of further Nicotine Replacement Therapy (NRT); a further £100 voucher will be sent if they are self report abstinent 12 weeks after quit date corroborated by either a routinely collected carbon monoxide breath test taken by pharmacy services prior to dispensing of further NRT; or a carbon monoxide test specially collected either in the Clinical Research Facility or by the research nurse at home; a final £200 store voucher will be given if the intervention client when contacted by NHS Smoking Helpline at 34-38 weeks gestation (about 6 months after their quit date) self report as abstinent and they then attend an appointment with the trial research nurse who collects a urine/saliva sample which is negative for cotinine, a nicotine metabolite. The intervention group will also receive the offer of standard smoking cessation support starting with face to face support from an NHS Smokefree Pregnancy Service adviser followed by pharmacy dispensed Nicotine Replacement Therapy for women who decide to set a quit date and quit smoking. The control group: The control group will receive the offer of standard smoking cessation intervention with face to face support from an NHS Smokefree Pregnancy Service adviser followed by pharmacy dispensed Nicotine Replacement Therapy for women who set a quit date and quit smoking. |
| Intervention type | Other |
| Primary outcome measure(s) |
Cotinine verified cessation at 34-38 weeks gestation towards the end of pregnancy |
| Key secondary outcome measure(s) |
The cost effectiveness of the incentives intervention strategy. This phase II trial will examine the literature related to incentives for lifestyle change, develop data collection measures and systems for this phase II trial and then test them within a trial format. This will establish data collection systems so that cost effectiveness if present can be demonstrated with appropriate confidence in a future phase III trial |
| Completion date | 31/12/2013 |
Eligibility
| Participant type(s) | Patient |
|---|---|
| Age group | Adult |
| Sex | Female |
| Target sample size at registration | 600 |
| Key inclusion criteria | 1. 16 years and above 2. Female 3. Pregnant 4. English speaking 5. Referred to NHS Smokefree Pregnancy Service in Greater Glasgow and Clyde 6. Successfully contacted by NHS Smoking Helpline 7. Less than 24 weeks gestation at maternity booking 8. Carbon monoxide (CO) level 7ppm or greater at maternity booking 9. Self reported smoker at maternity booking 10. Permission given at first telephone contact to pass information to the Listening Company (NHS Smoking Helpline) for further discussion about the trial |
| Key exclusion criteria | 1. Not pregnant 2. Unable to provide informed consent 3. Non-English speaking 4. Not living in Greater Glasgow and Clyde catchment area or referred to Greater Glasgow and Clyde Obstetric Services 5. Referred pregnant smokers who cannot be contacted by NHS Smoking Helpline 6. CO level less than 7ppm at maternity booking 7. Not self reported smoker at maternity booking 8. Permission refused at first telephone contact to pass information to the Listening Company (NHS Smoking Helpline) for further discussion about the trial |
| Date of first enrolment | 01/09/2011 |
| Date of final enrolment | 31/12/2013 |
Locations
Countries of recruitment
- United Kingdom
- Scotland
Study participating centre
G3 8SJ
United Kingdom
Results and Publications
| Individual participant data (IPD) Intention to share | No |
|---|---|
| IPD sharing plan summary | Not provided at time of registration |
| IPD sharing plan |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Results article | results | 27/01/2015 | Yes | No | |
| Results article | results | 26/08/2016 | Yes | No | |
| Results article | results | 20/07/2017 | Yes | No | |
| Protocol article | protocol | 20/07/2012 | Yes | No | |
| Participant information sheet | Participant information sheet | 11/11/2025 | 11/11/2025 | No | Yes |
Editorial Notes
25/07/2017: Publication reference added.
30/08/2016: Publication reference added.
