Efficacy of a mobile phone-based life-skills training program for substance use prevention among adolescents

Efficacy of a mobile phone-based life-skills training program for substance use prevention among adolescents: Study protocol of a cluster-randomised controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN41347061

Enrollment

1312

Registered

2018-07-21

Start date

2019-01-01

Completion date

Unknown

Last updated

2024-08-26

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

Conditions

Substance use, tobacco, alcohol Not Applicable Substance use, smoking, alcohol

Interventions

Participants will be cluster-randomised, using school class as a randomisation unit. Due to the heterogeneity of students in the different secondary schools, we will use a separate randomisation list

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Secondary school student 2. Minimum age 14 3. Possession of a mobile phone

Exclusion criteria

Exclusion criteria: N/A

Design outcomes

Primary

Measure	Time frame
The following will be assessed at the baseline and after 6 and 18 months follow up: 1. Prevalence of problem drinking in the preceding 30 days, assessed using the Alcohol Use Disorders Identification Test (AUDIT-C) 2. Point prevelance rate for smoking abstinence in the preceding 30 days, assessed using the criteria of the Society for Nicotine and Tobacco Research	—

Secondary

Measure	Time frame
The following will be assessed at the baseline and after 6 and 18 months follow up: 1. Prevalence of cannabis use in the preceding 30 days, assessed using an item of the Health Behaviour in School Aged Children (HBSC) study addressing the number of cannabis consumption days 2. Quantity of alcohol use in the preceding 30 days, assessed using the Alcohol Use Disorders Identification Test (AUDIT-C) 3. Quantity of cigarettes smoked in the preceding 30 days by assessing the number of smoking days and the typical number of cigarettes smoked per smoking day, self-reported by participants 4. Perceived stress, assessed using a 4 item version of the Perceived Stress Scale (PSS-4) 5. Interpersonal competences, assessed using the brief version of the Interpersonal Competence Questionnaire (ICQ), addressing the following domains of social competence: 5.1. Initiation of relationships 5.2. Negative assertion 5.3. Disclosure of personal information 5.4. Emotional support 5.5. Conflict management	—

Measure

Time frame

The following will be assessed at the baseline and after 6 and 18 months follow up: 1. Prevalence of cannabis use in the preceding 30 days, assessed using an item of the Health Behaviour in School Aged Children (HBSC) study addressing the number of cannabis consumption days 2. Quantity of alcohol use in the preceding 30 days, assessed using the Alcohol Use Disorders Identification Test (AUDIT-C) 3. Quantity of cigarettes smoked in the preceding 30 days by assessing the number of smoking days and the typical number of cigarettes smoked per smoking day, self-reported by participants 4. Perceived stress, assessed using a 4 item version of the Perceived Stress Scale (PSS-4) 5. Interpersonal competences, assessed using the brief version of the Interpersonal Competence Questionnaire (ICQ), addressing the following domains of social competence: 5.1. Initiation of relationships 5.2. Negative assertion 5.3. Disclosure of personal information 5.4. Emotional support 5.5. Conflict management

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Countries

Switzerland

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 5, 2026