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Cardiovascular Health Change Patterns After Multifaceted Antihypertensive Intervention and Cardiovascular Outcomes: A
Xiaofan Guo1, Guozhe Sun1, Ziyi Xie2
1Department of Cardiology, The First Hospital of China Medical University, Shenyang, Liaoning, China.
Insights
This study shows that a community health intervention significantly reduced cardiovascular risk, primarily by improving blood pressure (BP). Combined improvements in BP with behavioral or metabolic factors offered the greatest risk reduction.
Area of Science:
- Cardiovascular Health
- Public Health Interventions
- Health Behavior Change
Background:
- Cardiovascular health (CVH) assessment uses a multidimensional framework, with interventions targeting CVH metrics.
- Patterns of CVH change and their link to clinical outcomes after interventions require further clarification.
Purpose of the Study:
- To characterize CVH change patterns post-intervention.
- To examine how multidimensional response domains from Life's Simple 7 relate to cardiovascular outcomes.
Main Methods:
- Post hoc analysis of 26,700 participants in the China Rural Hypertension Control Project.
- Intervention focused on intensive blood pressure (BP) management by nonphysician providers.
- Longitudinal CVH changes analyzed across BP, metabolic, and behavioral domains; associations with cardiovascular outcomes assessed via Cox models.
Main Results:
- Intervention improved LS7 scores and reduced cardiovascular risk (HR: 0.71).
- Greatest risk reduction observed with BP improvement plus behavioral/metabolic gains (HR: 0.57), followed by BP improvement alone (HR: 0.76).
- BP changes accounted for the majority of the effect (67.5%), with smaller contributions from behavioral (8.0%) and metabolic domains.
Conclusions:
- A scalable, nonphysician-delivered intervention effectively reduced cardiovascular risk, primarily through BP management.
- Heterogeneous, domain-specific responses were observed, with BP being the main driver of benefit.
- Provides a quantitative framework for understanding multifaceted interventions' impact on cardiovascular outcomes.
Background:
Cardiovascular health (CVH), as defined by the American Heart Association, provides a multidimensional framework for cardiovascular risk assessment. An increasing number of studies have developed intervention strategies based on CVH metrics. However, the multidimensional health change patterns resulting from these interventions and their relationship with clinical outcomes remain unclear.
Objectives:
The purposes of this study were to characterize patterns of change in CVH after intervention and to examine how multidimensional response domains derived from Life's Simple 7 (LS7) components relate to subsequent cardiovascular outcomes.
Methods:
This post hoc analysis of the China Rural Hypertension Control Project included 26,700 participants. The intervention consisted of intensive blood pressure (BP) management delivered by nonphysician community health care providers, targeting <130/80 mm Hg. Changes in CVH over 0-36 months were longitudinally characterized across the LS7 components and grouped into BP, metabolic, and behavioral domains. Associations between domain-specific change patterns and subsequent cardiovascular outcomes (36-48 months) were evaluated using Cox proportional hazards models.
Results:
Among 26,700 participants (age 62.5 ± 9.0 years; 63.0% women), the intervention improved LS7 scores at 36 months (net difference: 0.52; 95% CI: 0.38-0.66), with cardiovascular risk reduction observed among participants with improved CVH (HR: 0.71; 95% CI: 0.54-0.89). Longitudinal analyses showed sustained separation in BP between groups, with only modest and less-differentiated changes in other components. Across multidomain patterns, the greatest reduction in cardiovascular risk was observed among participants with BP improvement plus concurrent behavioral or metabolic gains (HR: 0.57; 95% CI: 0.30-0.84), followed by BP improvement alone (HR: 0.76; 95% CI: 0.55-0.98), with no significant benefit in other patterns. Net benefit analyses showed a consistent gradient across patterns. Mediation analyses indicated that BP accounted for the majority of the observed effect (67.5%), with modest contributions from behavioral (8.0%) and minimal contributions from metabolic domains. Results were consistent across sensitivity analyses.
Conclusions:
In this large community-based randomized trial, a scalable intervention delivered by nonphysician providers reduced cardiovascular risk, with the benefit primarily driven by BP, alongside modest contributions from behavioral and metabolic domains. This asymmetry highlights heterogeneous, domain-specific responses and provides a quantitative framework for understanding how multifaceted interventions translate into cardiovascular outcomes. (China Rural Hypertension Control Project (CRHC); NCT03527719).
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