Effectiveness of an optimized mobile phone-based life skills training program for addiction prevention among adolescents

Effectiveness of a mobile phone-based life skills training program for addiction prevention among adolescents optimized with regard to social inequalities: a cluster randomized controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN10423173

Enrollment

860

Registered

2023-08-18

Start date

2023-09-01

Completion date

Unknown

Last updated

2026-08-03

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

Conditions

Substance use prevention Mental and Behavioural Disorders

Interventions

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

Eligibility

Sex/Gender

All

Age

14 Years to 17 Years

Inclusion criteria

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

Exclusion criteria

Exclusion criteria: Not meeting the participant inclusion criteria

Design outcomes

Primary

Measure	Time frame
The following primary outcome measures will be assessed at the baseline and at the 6-month follow-up: 1. Alcohol use in the preceding 30 days measured using the Alcohol Use Disorders Identification Test (AUDIT-C) 2. Number of days that nicotine-containing products are smoked in the preceding 30 days measured using a questionnaire 3. Cannabis use days in the preceding 30 days measured using a questionnaire	—

Measure

Time frame

The following primary outcome measures will be assessed at the baseline and at the 6-month follow-up: 1. Alcohol use in the preceding 30 days measured using the Alcohol Use Disorders Identification Test (AUDIT-C) 2. Number of days that nicotine-containing products are smoked in the preceding 30 days measured using a questionnaire 3. Cannabis use days in the preceding 30 days measured using a questionnaire

—

Secondary

Measure	Time frame
The following secondary outcome measures will be assessed at the baseline and at the 6-month follow-up: 1. Perceived stress measured using a single item from the Swiss Juvenir study: “How often have you had the feeling of being overstressed or overwhelmed in the last month?” 2. Interpersonal competencies measured using the brief version of the Interpersonal Competence Questionnaire (ICQ-10) The following secondary outcome measure concerning program use will be measured from the server protocol: Total number of interactions with the program (replying to quizzes, retrieving media objects like videos or web links, and participating in self-challenges or contests)	—

Measure

Time frame

The following secondary outcome measures will be assessed at the baseline and at the 6-month follow-up: 1. Perceived stress measured using a single item from the Swiss Juvenir study: “How often have you had the feeling of being overstressed or overwhelmed in the last month?” 2. Interpersonal competencies measured using the brief version of the Interpersonal Competence Questionnaire (ICQ-10) The following secondary outcome measure concerning program use will be measured from the server protocol: Total number of interactions with the program (replying to quizzes, retrieving media objects like videos or web links, and participating in self-challenges or contests)

—

Countries

Switzerland

Contacts

Public ContactSeverin Haug

severin.haug@isgf.uzh.ch+41444481174

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Aug 9, 2026