Effectiveness of the "Smoke-Free Class Competition" (SFC) in delaying the onset of smoking in Polish students: a cluster-randomized controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN39902015

Enrollment

2940

Registered

2008-01-14

Start date

2007-10-15

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 prevention Mental and Behavioural Disorders Smoking prevention

Interventions

Participating schools will be randomised to the intervention and control groups. Intervention group: "Smoke-Free Class Competition" ("Wspólzawodnictwo Klasa Wolna od Dymu") Control group: Treatment

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Students of public schools 2. Age between 10?13 years old (10 year on the beginning of the study, 4th grade) 3. Written consent of parents

Exclusion criteria

Exclusion criteria: 1. Students of schools with special pedagogic needs 2. Missing parental consent

Design outcomes

Primary

Measure	Time frame
The following will be assessed by questionnaires at the end of intervention and at 12- and 18-month follow-up: 1. Knowledge on smoking consequences 2. Attitudes towards smoking 3. Intention to use tobacco 4. Smoking status	—

Secondary

Measure	Time frame
The following will be assessed by questionnaires at the end of intervention and at 12- and 18-month follow-up: 1. Class climate 2. Bullying	—

Countries

Poland

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026