Dietary Intervention Increasing Omega-3 Intake

Study Overview
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Brief Summary
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This Dietary Intervention is being done to evaluate the feasibility of a food voucher program and dietary counseling to increase consumption of healthy fatty acids (omega-3) in individuals with Chronic Obstructive Pulmonary Disease (COPD).

Detailed Description
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The goal of this pilot intervention is to evaluate the feasibility of a food voucher program and dietary counseling to increase dietary intake of omega-3 fatty acid in individuals with COPD. This hypothesis is based on a number of recent observations. Studies have investigated the impact of omega-3 fatty acids, especially Eicosapentaenoic acid (EPA), Docosahexaenoic acid (DHA), alfa-linolenic acid (ALA) intake in chronic diseases and show a link with decreased systemic inflammation measured by cytokines including interleukin 1 (IL-1B), interleukin 6 (IL-6), interleukin 10 (IL-10), tumoral necrosis factor alfa (TNF-α) and eicosanoids; and improved outcomes. In a large cross-sectional study of individuals with COPD, a diet rich in the omega-3 ALA was associated with lower serum TNF-α levels while a diet rich in the omega-6's LA and arachidonic acid (AA) had higher systemic inflammatory markers IL-6 and c-reactive protein (CRP). Other recent nutritional epidemiological study showed the association of greater intakes of omega-3 fatty acids with better lung function profile, but also a slower forced expiratory volume at the 1 second (FEV1) decline in the same smoker cohort. Preliminary cross-sectional data (n=59), from the CLEAN Air study, reported that at baseline, a higher omega 3 dietary intake was linked with reduced systemic inflammation (IL-1B) and improved respiratory outcomes (a 28% decrease in the odds of COPD symptoms in moderate-severe COPD and conversely, higher omega-6 levels associated with worse outcomes, including increased dyspnea and lower lung function. These findings support the importance of implementing an intervention program to confirm there is a beneficial association between fatty acid dietary intake and reduced COPD symptoms. To this end, the investigators propose a pilot intervention study in 20 subjects to see if the investigators can increase omega-3 dietary intake over a 4 week period. The investigators will measure self-report dietary intake of omega 3 and 6 fatty acids, as well as measure, fasting plasma fatty acid levels, before and after the intervention.

Official Title
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Dietary Intervention Increasing Omega-3 Intake- Feasibility Trial

Conditions
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Chronic Obstructive Pulmonary Disease

Intervention / Treatment
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* Other: voucher for ordering foods (ONLY omega-3 rich foods)
* Other: voucher for ordering foods in general (any type of foods)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age ≥ 40 years, Physician diagnosis of COPD, Global Initiative for Obstructive Lung Disease (GOLD) Stage II-IV disease with Forced -Expiratory Volume (FEV1)/ Forced Vital Capacity (FVC) <70% and FEV1 (% predicted) <80%, Tobacco exposure ≥ 10 pack-years Former smoker with an exhaled Carbon Monoxide (eCO)<=6 ppm to confirm smoking status No home smoking ban. Subjects with low omega-3 intake (EPA+DHA levels <500mg) based on data extracted from a food frequency questionnaire (FFQ) completed before the randomization. Exclusion Criteria: Chronic systemic corticosteroids, Other chronic lung disease including asthma, Living in location other than home (e.g., long term care facility) Homeowner or occupant planning to move or change residence within study period.

Ages Eligible for Study
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Minimum Age: 40 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Intervention group<br>The Intervention group will receive a voucher for ordering foods (ONLY omega-3 rich foods) weekly (4 times). | Other: voucher for ordering foods (ONLY omega-3 rich foods)<br>* A voucher will be provided weekly (4 times) for ordering only omega-3 rich foods. Groceries will be delivered to participants' home weekly.<br>|
| Sham Comparator: Control group<br>The Control group will receive a voucher for ordering foods in general (any type of foods) weekly (4 times). Participants will NOT be limited to purchasing foods rich in omega-3. | Other: voucher for ordering foods in general (any type of foods)<br>* A voucher will be provided weekly (4 times) for ordering any type of food. Groceries will be delivered to participants' home weekly.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in serum omega 3 levels | Omega 3 levels in serum (mg) will be measured at each study visit. | Baseline, 2 weeks and 4 weeks | 
| Change in omega 3 intake | A food frequency questionnaire will be administered at baseline and 4 weeks after randomization to estimate omega 3 intake (mg) at each study visit | Baseline and 4 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in health status as assessed by the Clinical COPD Questionnaire (CCQ) | The CCQ is a validated score to assess health status in COPD subjects. Score ranges from 0 to 6. The higher the score indicates lower health status. | Baseline, 2 weeks and 4 weeks | 
| Change in the Cough and Sputum Assessment Questionnaire (CASA-Q) Score | The CASA-Q will be administered at each study visit. Total score ranges from 0 to 100, with higher scores associated with fewer symptoms/less impact due to cough or sputum. | Baseline, 2 weeks and 4 weeks | 
| Change in Functional status (CAT) | Functional status will be assessed with the COPD assessment test (CAT). The total score is from 0 to 40. Higher scores indicate worse COPD control | Baseline, 2 weeks and 4 weeks | 
| Change in FEV1 percentage predicted | Pulmonary function testing will be assessed as FEV1 percentage predicted, that is FEV1, adjusted for age, height, race and sex. | Baseline, 2 weeks and 4 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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COPD