A Behavioral Intervention To Improve Hypertension Control In Veterans

Study Results

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Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

533 participants

Study Classification

INTERVENTIONAL

Study Start Date

2006-07-31

Study Completion Date

2011-09-30

Brief Summary

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The purpose of this study is to determine whether a stage-matched intervention (SMI) will lower BP and improve treatment adherence compared to usual care (UC) or a health education intervention (HEI) in veterans with uncontrolled BP. The study will also examine the effect of SMI on patient's health-related quality of life, satisfaction, acceptability and determine its cost-effectiveness.

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Detailed Description

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We propose a randomized controlled trial to evaluate the effect of telephone-delivered interventions (SMI and HEI) to improve BP control.

Veterans with uncontrolled hypertension (n=533) will be randomized equally to 3 groups: 1) The SMI will use the Transtheoretical model (TTM) as the unifying framework. Veterans will receive TTM stage-matched counseling for exercise, diet, and medications via monthly counseling sessions. A social worker (SW) will assess each participant's behavior and deliver the appropriate tailored SMI based on their stage of change, decisional balance, self-efficacy and the skills model questions. 2) The HEI group receives monthly telephone calls by a SW during which they will receive education about hypertension management. 3) The UC group participates in all the in-person visits but does not receive monthly calls.

There will be an initial 6-month active intervention phase followed by a 6 month monitoring phase to assess sustainability. All participants will visit the VAMC's at baseline and at 3, 6, and 12 months. Outcomes of interest include BP; adherence (to diet, exercise and medications); quality of life; satisfaction; acceptability; cost and cost-effectiveness. Patients will be blinded to which of the intervention arms (SMI or HEI) they are in, SW's will be blinded to patient's BP and staff measuring outcomes will be blinded to study assignment. The study will be analyzed using longitudinal data analysis methods using an intention to treat strategy.

Conditions

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Hypertension

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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Stage-matched intervention (SMI)

Group Type EXPERIMENTAL

SMI

Intervention Type BEHAVIORAL

Stage-matched intervention

HEI

Intervention Type BEHAVIORAL

Health Education Intervention

UC

Intervention Type BEHAVIORAL

Usual Care

Health Education Intervention (HEI)

Group Type ACTIVE_COMPARATOR

SMI

Intervention Type BEHAVIORAL

Stage-matched intervention

HEI

Intervention Type BEHAVIORAL

Health Education Intervention

UC

Intervention Type BEHAVIORAL

Usual Care

Usual Care (UC)

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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SMI

Stage-matched intervention

Intervention Type BEHAVIORAL

HEI

Health Education Intervention

Intervention Type BEHAVIORAL

UC

Usual Care

Intervention Type BEHAVIORAL

SMI

Stage-matched intervention

Intervention Type BEHAVIORAL

HEI

Health Education Intervention

Intervention Type BEHAVIORAL

UC

Usual Care

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Patients receiving continuity of care in the outpatient clinics will be eligible. This will be operationalized as 2 visits in the previous year.
* Adults (= 21 years) with hypertension, on antihypertensive medication for = 1 year, and who have current uncontrolled BP will be enrolled.

Patients with CVD:

* chronic stable angina
* unstable angina
* uncomplicated myocardial infarction
* coronary artery bypass surgery
* percutaneous coronary angioplasty
* atherectomy or stent placement
* chronic stable angina pectoris
* stable Class I or Class II congestive heart failure
* stroke
* peripheral vascular disease

will be entered into the study if the CVD event or diagnosis occurred = 6 months ago.

Exclusion Criteria

Patients with limited life expectancy (\< 1 year) due to severe co-existing non-CVD disease such as:

* terminal illnesses such as terminal cancer
* CVD \< 6 months ago
* Class III or IV CHF
* severe psychiatric illness such as psychosis
* manic depression
* alcohol abuse (\> 21 drinks/week)
* serious chronic conditions like AIDS
* tuberculosis
* lupus
* and end-stage renal failure

will be excluded.

* Other exclusions include inability to understand English
* Lack of a landline telephone
* Unable to follow the study protocol
* Recent major surgery (\< 3 months)
* Patients who are temporarily in the area and plan to move in \< 1 year or will not be available for follow-up
* Those unable to provide informed consent.
* All patients excluded and reason for exclusion will be recorded.
* Prior to recruitment, each patient will be informed about the study and informed consent obtained.

Minimum Eligible Age

21 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No