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Developing complex interventions for rigorous evaluation--a case study from rural Zimbabwe
R Power1, L F Langhaug, T Nyamurera
1Centre for Sexual Health and HIV Research, University College London, London WC1E 6AU, UK. rpower@gum.ucl.ac.uk
Health Education Research
|May 25, 2004
Summary
A feasibility study revealed that an initial adolescent sexual health intervention in rural Zimbabwe was undeliverable. Redesigns based on formative and process evaluations are now being tested for effectiveness.
Area of Science:
- Public Health
- Intervention Science
- Adolescent Health
Background:
- Developing complex public health interventions requires meticulous planning and feasibility studies.
- Ensuring intervention appropriateness is critical for trial success, especially in areas like reproductive health.
Purpose of the Study:
- To describe how a feasibility study informed the redesign of a complex adolescent sexual health intervention in rural Zimbabwe.
- To highlight the importance of formative and process evaluations in intervention development.
Main Methods:
- A mixed-methods approach including in-depth interviews, focus groups, and participant observation.
- Engaged stakeholders: pupils, parents, teachers, and education officers.
- Conducted formative and process evaluations within the feasibility study.
Main Results:
- The originally conceived intervention was deemed undeliverable in the rural Zimbabwean context.
- Process evaluation findings necessitated substantial changes to intervention content and delivery.
- The redesigned intervention is now undergoing effectiveness testing in a community randomized trial.
Conclusions:
- Feasibility studies are essential for adapting complex interventions to specific contexts.
- Process evaluation is crucial for refining intervention delivery and content.
- Rigorous feasibility work improves the likelihood of success for public health interventions.