Caribbean and South American team-based strategy to control hypertension (CATCH): Rationale and study design of a cluster randomized trial
Study context
- Population
- Patients with hypertension in primary care clinics in Colombia and Jamaica
- Participants
- 1,707 patients · 40 clinics
- Planned comparison
- Team-based strategy vs Provider-training strategy
- Primary endpoint
- Primary clinical effectiveness outcome: difference in mean change of systolic BP between randomized groups; primary implementation outcome: composite fidelity score to key implementation strategy components
- Follow-up
- From baseline to 18 months
Methodological detailseffectiveness-implementation hybrid type-2 design, 40 primary care clinics in Jamaica and Colombia, Recruitment February 2023 to August 2024, Planned sample size 1,680 (42 patients per each of 40 clinics): 90% power to detect a 6.0 mm Hg difference in mean SBP change, assuming 85% follow-up, 2-sided significance level 0.05
- Effectiveness-implementation hybrid type-2 design
- 40 primary care clinics in Jamaica and Colombia
- Recruitment February 2023 to August 2024
- Planned sample size 1,680 (42 patients per each of 40 clinics): 90% power to detect a 6.0 mm Hg difference in mean SBP change, assuming 85% follow-up, 2-sided significance level 0.05
No results yet. This paper sets out the design of a trial; its results are to come.
Original publication
Caribbean and South American team-based strategy to control hypertension (CATCH): Rationale and study design of a cluster randomized trial. Am Heart J. Published 17 December 2025. doi:10.
Summarised from the published abstract; every number is checked against it