Evaluation of the OKO-model in the Netherlands

Investigating a Community-Based Prevention Framework Targeting Adolescents’ Substance Use in the Netherlands: Study Protocol of a Quasi-Experimental Pragmatic Cluster Design - Community-Based Prevention Framework (OKO) Targeting Adolescents’ Substance Use in the Netherlands

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

NL-OMON

Registry ID

NL-OMON61202

Enrollment

7500

Registered

2026-05-27

Start date

2023-01-01

Completion date

Unknown

Last updated

2026-06-08

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

Conditions

substance use

Interventions

Opgroeien in een Kansrijke Omgeving (OKO)

a community-based prevention framework targeting adolescents' substance use.&nbsp

Eligibility

Inclusion criteria

Inclusion criteria: All youth aged 12-18 years and their parents living in the OKO community in the Netherlands. Dutch speaking and writing Professionals working with youth and their families of the OKO communities

Exclusion criteria

Exclusion criteria: Youth, family that do not live / work in the OKO-community

Design outcomes

Primary

Measure	Time frame
The current study aims to investigate OKO through 1) a process evaluation to map barriers and facilitators of its implementation and 2) an intermediate outcome evaluation to evaluate early changes in risk and protective factors and adolescent substance use.	—

Secondary

Measure	Time frame
The current study aims to investigate OKO through 1) a process evaluation to map barriers and facilitators of its implementation and 2) an intermediate outcome evaluation to evaluate early changes in risk and protective factors and adolescent substance use.	—

Countries

Netherlands

Contacts

Public ContactI.M. Koning

Vrije Universiteit

h.m.koning@vu.nl0629373351

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP) · Data processed: Jun 11, 2026