An evaluation of the relative effectiveness of interventions based on the transtheoretical model (TTM) of behaviour change (stages of change) compared with standard care in helping women to stop smoking in pregnancy

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN89131885

Enrollment

918

Registered

2005-07-07

Start date

1999-03-01

Completion date

Unknown

Last updated

2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Smoking in pregnancy Pregnancy and Childbirth Smoking in pregnancy

Interventions

A cluster randomized trial of three interventions: 1. Standard care 2. Self-help manual and enhanced stage-based counselling 3. Self-help manual, enhanced stage-based counselling and use of an interac

Eligibility

Sex/Gender

Female

Inclusion criteria

Inclusion criteria: Pregnant, aged at least 16 years of age, smoking at the time of booking for maternity care, able to read English.

Exclusion criteria

Exclusion criteria: Not provided at time of registration

Design outcomes

Primary

Measure	Time frame
Biochemically confirmed continuous abstinence for 10 weeks at the end of pregnancy.	—

Secondary

Measure	Time frame
Point prevalence abstinence, self-reported abstinence.	—

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 12, 2026