Efficacy of a behavior change program on cardiovascular parameters in patients with hypertension: a randomized controlled trial

Abstract

Objective: To investigate the efficacy of a behavior change program named Vida Ativa Melhorando a Saúde on cardiovascular parameters in hypertensive patients.

Methods: Ninety hypertensive patients aged over 40 years were randomly allocated to one of two groups: Vida Ativa Melhorando a Saúde or Control (n=45 respectively). Patients in the Vida Ativa Melhorando a Saúde group took part in a behavior change program aimed to encourage changes in physical activity levels and eating habits, according to the Social Cognitive Theory. The program consisted of 90-minute weekly group meetings conducted by a physical therapist and a dietitian. One chapter of the educational material (workbook) provided was discussed per meeting. Participants in the Control Group attended a single educative lecture on lifestyle changes. Brachial and central blood pressure, arterial stiffness and endothelial function parameters were measured pre- and post-intervention.

Results: Vida Ativa Melhorando a Saúde led to reduction of brachial (131.3±15.8mmHg to 125.1±17.3mmHg; p<0.01) and central (123.6±16.3mmHg to 119.0±20.6mmHg; p=0.02) systolic and brachial diastolic (123.6±16.3mmHg to 119.0±20.6mmHg; p<0.01) blood pressure values, and improvement of post-occlusive reactive hyperemia (from 5.7±2.5mL·100mL-1 to 6.5±2.1mL·100mL-1 tissue·min-1; p=0.04). No changes in body composition, heart rate and arterial stiffness parameters were detected in both groups (p>0.05).

Conclusion: Vida Ativa Melhorando a Saúde program improved blood pressure and microvascular reactivity in hypertensive patients. Trial registration: ClinicalTrials.gov: NCT02257268.

Conflict of interest statement

Conflict of interest: none.

Figures

Figure 1. Study flowchart

VAMOS: Vida Ativa Melhorando a Saúde .

Figure 2. Pre- and post-intervention brachial and central blood pressure values of participants in both groups

† p<0.05 versus pre. bSBP: brachial systolic blood pressure; NS: non-significant; VAMOS: Vida Ativa Melhorando a Saúde ; bDBP: brachial diastolic blood pressure; cSBP: central systolic blood pressure; cDBP: central diastolic blood pressure.

Figura 1. Fluxograma do estudo

VAMOS: Vida Ativa Melhorando a Saúde .

Figura 2. Valores de pressão arterial braquial e central de ambos os grupos nas fases pré e pós-intervenção

†p<0,05 comparado com pré. PASb: pressão arterial sistólica braquial; NS: não significante; VAMOS: Vida Ativa Melhorando a Saúde; PADb: pressão arterial diastólica braquial; PASc: pressão arterial sistólica central; PADc: pressão arterial diastólica central.

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