Heart-Healthy Lenoir Lifestyle Study

Not Applicable

Completed

• Conditions: Cardiovascular Disease; Obesity
• Interventions: Behavioral: Maintenance of Weight Loss--Experimental; Behavioral: Maintenance of Weight Loss--Control

• Registration Number: NCT01433484
• Lead Sponsor: University of North Carolina, Chapel Hill

Brief Summary

This study aims to reduce cardiovascular disease (CVD) risk and disparities in risk by improving lifestyle factors which underlie the development of CVD. The first steps will involve conducting a comprehensive formative evaluation to assess individual, interpersonal, organizational, community, and policy factors relevant to CVD risk and risk reduction in Lenoir County. This will be followed by a community-based lifestyle intervention program designed to improve eating patterns, promote physical activity, and for those who are interested, support weight loss. A randomized trial comparing the effectiveness of two community based weight maintenance interventions will also be conducted. Community-wide policy and environmental change interventions will also be implemented to support the individual-level interventions, including partnerships with businesses to promote a healthy environment through innovative economic opportunities. In addition, this project will explore genetic factors associated with cardiovascular disease risk and treatment success.

Detailed Description

The lifestyle intervention will enroll 350 participants. The initial lifestyle component of this study, which lasts for 4-6 months, will be provided to all participants. Participants may chose from one of two intervention formats, each with 4 contacts: individual counseling with at least one face-to-face visit and the rest face-to-face or by phone or 4 group sessions. The dietary intervention will focus on improving fat and carbohydrate quality. For fat intake, the goals include 2-4 servings per day of polyunsaturated fat primarily from plant sources and minimal intake of trans fat. For carbohydrate intake, the goals include increased intake of whole grains, fruits and vegetables, and beans and reduced consumption of refined carbohydrates. The physical activity intervention will primarily focus on walking with a goal of 7500 to 10,000 steps per day or, for those who do not wish to use a pedometer, 30 minutes of walking a day. Muscle strengthening activities will also be recommended. At the 4-6 month follow-up measures, those who wish to take part in a weight loss study may do so and those who do not will continue in a maintenance of lifestyle intervention.

The investigators anticipate approximately 200 participants will take part in the weight loss component of this study, which consists of a 6 month intensive weight loss intervention. Participants may choose from two intervention formats: 16 weekly group sessions or 5 group sessions and 10 phone counseling sessions. The weight loss goal will be 5% of body weight. At the conclusion of this program, those who lose at least 8 pounds and are willing to take part in a 1 year maintenance of weight loss intervention will be RANDOMIZED to one of two maintenance of weight loss programs. One maintenance arm will receive monthly telephone contacts for one year, while the other arm will receive bi-monthly phone contacts.

Follow-up measures for all participants will be at approximately 6, 12, 18, and 24 months.

Another related part of the project will use a systems approach to develop models integrating clinical and genomic data. Researchers have developed and tested an approach referred to as the SAMARA (Supporting A Multidisciplinary Approach to Research in Atherosclerosis) Project that applies recent, major advances in biomedical and computational sciences at UNC to develop a deeper understanding of human CVD. The Heart-Healthy Lenoir Project will expand studies into the community, using this methodology to: 1) determine the prevalence of genomic risk signatures in high-risk community populations using genome-wide Single Nucleotide Polymorphism (SNP) analysis; 2) develop novel genomic models incorporating high-risk features in this population; and 3) determine whether genomic signatures can be used to predict responsiveness to interventions that underlie CVD disparities. Participants who consent to this component of the project will have a blood specimen obtained at baseline.

Study Timeline

• Study First Submitted: 2011-08-30
• Study Start: 2011-09
• Study First Submitted QC: 2011-09-12
• Study First Posted: 2011-09-14
• Primary Completion: 2014-10
• Study Completion: 2014-10
• Status Verified: 2015-08
• Last Update Submitted: 2017-11-16
• Last Update Posted: 2017-11-20

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 339

Inclusion Criteria

1. 18 years or older
2. live in Lenoir County or a neighboring county in Eastern North Carolina
3. anyone enrolled in the Lifestyle study is eligible to participate in the genomics component of the project.

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Exclusion Criteria

1. non-English speaking
2. treatment of psychosis
3. alcohol or substance abuse within the two last years
4. history of malignancy, other than non-melanoma skin cancer, unless surgically cured > 5 years ago or in remission/well treated and not likely to have a negative effect on the patient's health over the next 2 years
5. estimated creatinine clearance less than 30 ml/min
6. lack of access to phone
7. advanced dementia
8. participants who have been diagnosed with a myocardial infarction within the past three months will be excluded from the study if they are unable to obtain written medical clearance from their clinician to participate in the study

Additional Exclusion Criteria - Weight Loss Intervention:

1. the investigators will not invite pregnant women to take part in the weight loss study.
2. if a woman becomes pregnant while taking part in this part of the study, we will withdraw her from the weight loss study and invite her to continue in the lifestyle study.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Maintenance of Weight Loss--Experimental	Maintenance of Weight Loss--Experimental	The experimental arm will receive monthly telephone contacts for one year during the maintenance phase.
Maintenance of Weight Loss--Control	Maintenance of Weight Loss--Control	The control arm will receive bi-monthly telephone contacts during the one-year maintenance phase.

Primary Outcome Measures

Name	Time	Method
Embedded randomized trial: maintenance of weight loss	1 year after maintenance of weight loss trial begins	Weight will be measured by electronic scale
Cohort study: fruit and vegetable intake at 6 months	6 months	Fruit and vegetable intake will be measured by the Block fruit and vegetable sceener and by blood carotenoids

Secondary Outcome Measures

Name	Time	Method
Fruit and vegetable intake at 6 months	12, 18, and 24 months	Measured by Block fruit and vegetable screener
Physical activity	6m, 12m, 18m, 24 m	Measured by questionnaire and pedometer
Blood pressure	6, 12, 18, 24 months	measured by automated device
Genomic predictors of lifestyle change	6-, 12-, 18- and 24-month follow-up	A systems approach to developing genomic models integrating clinical and genomic data.
Weight	6, 12, 18, 24	Measured by electronic scale
Health related quality of life	6, 12, 24 months	SF-12 instrument
Blood lipids	12, 24 months	total and HDL cholesterol measured by commercial lab
A1c	6, 12, 24 months	measured by commercial lab

Trial Locations

Locations (1)

Heart Healthy Lenoir Project, Kinston Enterprise Center; 🇺🇸 Kinston, North Carolina, United States