Engaging adolescents in changing behaviour: a programme of research to improve the diets and physical activity levels of adolescents

Engaging adolescents in changing behaviour (EACH-B): a programme of research to improve the diets and physical activity levels of adolescents

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN74109264

Enrollment

2300

Registered

2019-08-30

Start date

2019-09-11

Completion date

Unknown

Last updated

2025-09-22

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

Conditions

Dietary quality and physical activity levels of teenagers aged 12-13 years old. Other

Interventions

Randomisation will be carried out by the University of Southampton's Clinical Trial Unit and will be at the school level. There will be 25 intervention and 25 control schools. The intervention conta

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: School children aged 12-13 years (Year 8) at state schools in Hampshire and surrounding areas

Exclusion criteria

Exclusion criteria: Single-sex schools

Design outcomes

Primary

Measure	Time frame
1. Dietary quality measured by purpose-made, validated Food Frequency Questionnaire (FFQ) at baseline and 12 months post intervention 2. Physical activity measured by accelerometry at baseline and 12 months post baseline	—

Secondary

Measure	Time frame
Current secondary outcome measures as of 01/09/2025: Measured at baseline and 12 months post-intervention: 1. Well-being measured using Child Health Utility (CHU 9D) and Cantril ladder 2. Self-regulation and motivation for having a healthy lifestyle in adolescence measured using purpose-made Confidence and Behavioural Autonomy questionnaires (undergoing validation) 3. Body composition: height and weight used to calculate BMI Z-scores, taking account of both sitting and standing height as an indicator of pubertal status change 4. Compliance/adherence to intervention protocol measured through process evaluation 5. Self-efficacy for healthy eating and physical activity measured through CBA questionnaires 6. Registration and use of the digital intervention measured through app usage data as part of the process evaluation 7. Teachers’ competence in HCS use measured as part of process evaluation 8. Educational outcomes, including science GCSE choices at three years post-intervention 9. Others specified by intervention planning (WP2.2) 10. Cost of intervention measured via health economics analysis 11. Categories of physical activity measured by accelerometry and validated YPAQ questionnaire 12. Qualitative feedback on implementation, mechanisms of impact and context. Measured by in-person and online interviews conducted as part of the process evaluation. Interviews conducted with students, teachers, heads of science and parents from intervention and control arm schools which took part in the EACH-B main RCT. Previous secondary outcome measures as of 06/05/2020: Measured at baseline and 12 months post-intervention: 1. Well-being measured using Child Health Utility (CHU 9D) and Cantril ladder 2. Self-regulation and motivation for having a healthy lifestyle in adolescence measured using purpose-made Confidence and Behavioural Autonomy questionnaires (undergoing validation) 3. Body composition: height and weight used to calculate BMI Z-scores, taking account of both sitting	—

Measure

Time frame

Current secondary outcome measures as of 01/09/2025: Measured at baseline and 12 months post-intervention: 1. Well-being measured using Child Health Utility (CHU 9D) and Cantril ladder 2. Self-regulation and motivation for having a healthy lifestyle in adolescence measured using purpose-made Confidence and Behavioural Autonomy questionnaires (undergoing validation) 3. Body composition: height and weight used to calculate BMI Z-scores, taking account of both sitting and standing height as an indicator of pubertal status change 4. Compliance/adherence to intervention protocol measured through process evaluation 5. Self-efficacy for healthy eating and physical activity measured through CBA questionnaires 6. Registration and use of the digital intervention measured through app usage data as part of the process evaluation 7. Teachers’ competence in HCS use measured as part of process evaluation 8. Educational outcomes, including science GCSE choices at three years post-intervention 9. Others specified by intervention planning (WP2.2) 10. Cost of intervention measured via health economics analysis 11. Categories of physical activity measured by accelerometry and validated YPAQ questionnaire 12. Qualitative feedback on implementation, mechanisms of impact and context. Measured by in-person and online interviews conducted as part of the process evaluation. Interviews conducted with students, teachers, heads of science and parents from intervention and control arm schools which took part in the EACH-B main RCT. Previous secondary outcome measures as of 06/05/2020: Measured at baseline and 12 months post-intervention: 1. Well-being measured using Child Health Utility (CHU 9D) and Cantril ladder 2. Self-regulation and motivation for having a healthy lifestyle in adolescence measured using purpose-made Confidence and Behavioural Autonomy questionnaires (undergoing validation) 3. Body composition: height and weight used to calculate BMI Z-scores, taking account of both sitting

—

Countries

England, United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 11, 2026