ISRCTN ISRCTN49741320
DOI https://doi.org/10.1186/ISRCTN49741320
Secondary identifying numbers N/A
Submission date
26/05/2016
Registration date
26/05/2016
Last edited
19/09/2018
Recruitment status
Stopped
Overall study status
Stopped
Condition category
Mental and Behavioural Disorders
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Plain English summary as of 18/09/2018:
Background and study aims
About 13% of women having babies in the Coombe Hospital smoke cigarettes. This is associated with an increased risk of having a baby weighing less than 2.5kg at birth, and of having a baby before he or she is due to be born (premature birth). Both low birth weight and preterm birth are the leading causes of health problems for babies, including failure of the baby to reach its growth potential, or even stillbirth. Smoking can lead to an increased risk of pregnancy-related problems for the mother as well, including separation of the placenta from the wall of the womb, causing bleeding. It has been shown that there is a relationship between the number of cigarettes smoked per day and the amount of risk placed on the pregnancy. Stopping smoking has well-known benefits, as does “cutting down”. There is, however, no proven cost effective way to help women to cut down or stop smoking during pregnancy. The aim of this study is to assess whether receiving smoking cessation advice and social media support via a secret website is more effective than the usual way of delivering smoking cessation advice (with pamphlets at the first pregnancy visit, and through doctors). We also hope to show that smoking cessation will result in fewer pregnancies complicated by a low birthweight baby or a baby born too early.

Who can participate?
Pregnant women aged over 18 who smoke

What does the study involve?
Participants are randomly allocated to either the control group or the intervention group. The control group receive standard antenatal care in which they receive routine advice on diet, exercise and smoking cessation. The intervention group receive standard antenatal care along with an individualised counselling session and social media support via a private website. The individualised counselling session includes advice on how to quit smoking, smoking cessation resources and the benefits of smoking cessation. At the first antenatal appointment the women are also invited to join a website for smoking cessation support which includes reasons to stop smoking, methods to stop smoking and also allows for interaction between members of the group. Participants are seen by the research team once at less than 24 weeks gestation and at one other time point in pregnancy to have measurements (weight, height, body composition), a urine test, a breath test, and to complete food diaries and questionnaires.

What are the possible benefits and risks of participating?
The possible benefits of participation include increased knowledge of the health risks, adverse pregnancy outcomes and financial cost of continuing to smoke during pregnancy. There are no known adverse risks of participation.

Where is the study run from?
The Coombe Women and Infants University Hospital (Ireland)

When is the study starting and how long is it expected to run for?
June 2015 to March 2018

Who is funding the study?
Coombe Women and Infants University Hospital (Ireland)

Who is the main contact?
Ciara Reynolds


Previous plain English summary:
Background and study aims
About 13% of women having babies in the Coombe Hospital smoke cigarettes. This is associated with an increased risk of having a baby weighing less than 2.5kg at birth, and of having a baby before he or she is due to be born (premature birth). Both low birth weight and preterm birth are the leading causes of health problems for babies, including failure of the baby to reach its growth potential, or even stillbirth. Smoking can lead to an increased risk of pregnancy-related problems for the mother as well, including high blood pressure or separation of the placenta from the wall of the womb, causing bleeding. It has been shown that there is a relationship between the number of cigarettes smoked per day and the amount of risk placed on the pregnancy. Stopping smoking has well-known benefits, as does “cutting down”. There is, however, no proven cost effective way to help women to cut down or stop smoking during pregnancy. The aim of this study is to assess whether receiving smoking cessation advice and social media support via a secret website is more effective than the usual way of delivering smoking cessation advice (with pamphlets at the first pregnancy visit, and through doctors). We also hope to show that smoking cessation will result in fewer pregnancies complicated by a low birthweight baby or a baby born too early.

Who can participate?
Pregnant women aged over 18 who smoke

What does the study involve?
Participants are randomly allocated to either the control group or the intervention group. The control group receive standard antenatal care in which they receive routine advice on diet, exercise and smoking cessation. The intervention group receive standard antenatal care along with an individualised counselling session and social media support via a private website. The individualised counselling session includes advice on how to quit smoking, smoking cessation resources and the benefits of smoking cessation. At the 24 weeks gestation antenatal appointment the women are also invited to join a website for smoking cessation support which includes reasons to stop smoking, methods to stop smoking and also allows for interaction between members of the group. Participants are seen by the research team once at less than 24 weeks gestation, at one other time point in pregnancy, at delivery, and 6 weeks after delivery, to have measurements (weight, height, body composition), a urine test, a breath test, and to complete food diaries and questionnaires.

What are the possible benefits and risks of participating?
The possible benefits of participation include increased knowledge of the health risks, adverse pregnancy outcomes and financial cost of continuing to smoke during pregnancy. There are no known adverse risks of participation.

Where is the study run from?
The Coombe Women and Infants University Hospital (Ireland)

When is the study starting and how long is it expected to run for?
June 2015 to March 2018

Who is funding the study?
Coombe Women and Infants University Hospital (Ireland)

Who is the main contact?
Ciara Reynolds

Contact information

Miss Ciara Reynolds
Public

Coombe Women and Infants University Hospital
Cork Street
Dublin 8
Dublin
8
Ireland

Study information

Study designSingle-centre interventional randomised controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Hospital
Study typeOther
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet.
Scientific titleStopping Smoking To Optimise Pregnancy (SSTOP): a randomised controlled trial
Study acronymSSTOP
Study objectivesThe hypothesis is that smoking cessation support, including an individualised counselling session and social media support via a private website (intervention group), will result in more women completely ceasing smoking compared with women receiving routine antenatal care alone (usual care group).
Ethics approval(s)Coombe Women and Infant University Hospital Research Ethics Committee, 14/10/2015, Ref: 17-2015
Health condition(s) or problem(s) studiedSmoking cessation in pregnant women
InterventionInterventions as of 18/09/2018:
The control group will receive standard antenatal care in which they will receive routine advice on diet, exercise and smoking cessation.

Women allocated to the intervention group will receive standard antenatal care along with an individualised counselling session and social media support via a private website. The individualised counselling session will include advice on how to quit smoking, smoking cessation resources and benefits of smoking cessation. At the first antenatal appointment the women will also be invited to join a website for smoking cessation support which will include pregnancy specific and evidence based information on reasons to cease smoking, methods to cease smoking and will also allow for interaction between members of the group.


Previous interventions:
The control group will receive standard antenatal care in which they will receive routine advice on diet, exercise and smoking cessation.

Women allocated to the intervention group will receive standard antenatal care along with an individualised counselling session and social media support via a private website. The individualised counselling session will include advice on how to quit smoking, smoking cessation resources and benefits of smoking cessation. At the 24 weeks gestation antenatal appointment the women will also be invited to join a website for smoking cessation support which will include pregnancy specific and evidence based information on reasons to cease smoking, methods to cease smoking and will also allow for interaction between members of the group.
Intervention typeBehavioural
Primary outcome measurePrimary outcome measure as of 18/09/2018:
Smoking cessation measured using urine samples and carbon monoxide breath tests. These will be collected at <17 weeks gestation and two months post recruitment.

Previous primary outcome measure:
Smoking cessation measured using urine samples and carbon monoxide breath tests. These will be collected at <24 weeks gestation, two months post recruitment, at delivery and 6 weeks postnatal.
Secondary outcome measuresSecondary outcome measure as of 19/09/2018:
1. Perceived stress score will be collected by questionnaire at <17 weeks gestation and two months post recruitment
2. Nicotine dependency will be collected by questionnaire at <17 weeks gestation and two months post recruitment
3. Preterm birth collected post-delivery from hospital's computerised system
4. Birthweight collected post-delivery from hospital's computerised system
5. Perinatal mortality collected post-delivery from hospital's computerised system
6. NICU admissions collected post-delivery from hospital's computerised system

Previous secondary outcome measure:
1. Perceived stress score will be collected by questionnaire at <24 weeks gestation, two months post recruitment, at delivery and 6 weeks postnatal
2. Nicotine dependency will be collected by questionnaire at <24 weeks gestation, two months post recruitment, at delivery and 6 weeks postnatal
3. Preterm birth collected post-delivery from hospital's computerised system
4. Birthweight collected post-delivery from hospital's computerised system
5. Perinatal mortality collected post-delivery from hospital's computerised system
6. NICU admissions collected post-delivery from hospital's computerised system
Overall study start date02/06/2015
Completion date30/09/2016
Reason abandoned (if study stopped)Participant recruitment issue

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
SexFemale
Target number of participants220 pregnant women
Key inclusion criteriaParticipant inclusion criteria as of 18/09/2018:
1. Age >18 years
2. <17 weeks gestation
3. Fluent in English
4. Ongoing singleton pregnancy
5. Self-reported smoker
6. Able to give written informed consent

Previous participant inclusion criteria:
1. Age >18 years
2. <24 weeks gestation
3. Fluent in English
4. Ongoing singleton pregnancy
5. Self-reported smoker
6. Able to give written informed consent
Key exclusion criteriaParticipant exclusion criteria as of 18/09/2018:
1. Age <18 years
2. >17 weeks gestation
3. Non-English speaking
4. Multiple pregnancy
5. Non-smoker
6. Unable to give written informed consent

Previous participant exclusion criteria:
1. Age <18 years
2. >24 weeks gestation
3. Non-English speaking
4. Multiple pregnancy
5. Non-smoker
6. Unable to give written informed consent
Date of first enrolment01/05/2016
Date of final enrolment30/09/2016

Locations

Countries of recruitment

  • Ireland

Study participating centre

The Coombe Women and Infants University Hospital
Cork Street
Dublin
4
Ireland

Sponsor information

Coombe Women and Infants University Hospital (Ireland)
Hospital/treatment centre

Cork Street
Dublin 8
Dublin
8
Ireland

ROR logo "ROR" https://ror.org/00bx71042

Funders

Funder type

Hospital/treatment centre

Coombe Women and Infants University Hospital (Ireland)

No information available

Results and Publications

Intention to publish date01/03/2019
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot expected to be made available
Publication and dissemination planTo be confirmed at a later date
IPD sharing plan

Editorial Notes

19/09/2018: The following changes were made to the trial record:
1. The interventions were updated
2. The primary outcome measures were updated
3. The secondary outcome measures were updated
4. The participant inclusion criteria was updated
5. The participant exclusion criteria was updated
6. The plain English summary was updated
7. Recruitment ended on 30/09/2016 due to insufficient recruitment
8. The trial ended on 30/09/2016 due to insufficient recruitment
23/10/2017: Internal review.