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The goal of this randomized control trial (RCT) is to test the feasibility and acceptability of a lifestyle intervention with a focus on implementing a high dose Mediterranean Diet protocol with physical activity to reduce systemic inflammation and body weight among WTC first responders having overweight/obesity and PTSD. The findings of this study will demonstrate the suitability of the proposed approach to reduce comorbidities among similar populations exposed to traumatic events; the findings will also inform the World Trade Center Health Program's extensive research and clinical efforts with the potential to provide a preventive care model to reduce systemic inflammation and related chronic disease among WTC responders with PTSD.
The proposed study will assess the feasibility and acceptability of a lifestyle intervention, including a Mediterranean Diet (MedDiet) with a physical activity (PA) component. The study is a pilot randomized control trial (RCT) among WTC responders with PTSD who have overweight and obesity. The 10-week intervention has two-arms, the intervention (MedDiet) with tips to increase PA (n=30) and control (care as usual n=30).
The high dose and high fidelity intervention combines several previously tested intervention modalities, including individual nutrition counseling, group cooking sessions, and communication and education through smartphones, including motivational texts & reminders, videos, teach-back surveys, and goal setting. While the main goal of the intervention is to assess the feasibility and acceptability of the intervention, the study will also assess changes in the overall dietary intake, the MedDiet score, and PA of the intervention group and between the two groups from baseline, post-intervention, and 3-month follow-up. The hypothesis is that the intervention group will experience a significant increase in the MedDiet score and PA activity from baseline to post-intervention; compared to the control group, the intervention group will achieve a significantly higher MedDiet score and will engage in more PA after the intervention.
Changes in body weight, inflammatory biomarkers, and prevalence of metabolic syndrome (MetS) in the intervention group and between the two groups from baseline to post-intervention will be explored; whether changes in inflammatory biomarkers, are moderated by changes in MetS, body weight, or MedDiet score will also be explored. The hypothesis is that the intervention group will experience a significant decrease in inflammatory biomarkers and prevalence in MetS from baseline to post-intervention; compared to the control group, the intervention group will achieve a significantly higher decrease in these measures; the decline in inflammatory biomarkers will be moderated by a reduction in the prevalence of MetS and/or increase in MedDiet score.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Mediterranean Diet & Physical Activity | Experimental | Nutrition with a Physical Activity component. 10-week intervention implementing the Mediterranean Diet. |
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| Usual Care | Active Comparator | Usual care involves one-on-one monthly nutrition counseling |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Mediterranean Diet & Physical Activity | Behavioral | At the beginning of each week (1-10), members were sent a text message introducing the week and providing the link to the week's website. This website includes downloadable material for this group with recipes and other important nutrition information, as well as the weekly topic information and informative video. After receiving the link to the website, members received a Qualtrics survey with a teach-back question related to the video and a goal-setting question related to the topics of the week. At the end of each week, members received another Qualtrics survey with a question regarding the goal of the past week.
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| Measure | Description | Time Frame |
|---|---|---|
| Mediterranean diet score | Participant's Mediterranean diet score is measured with a 14-item Mediterranean diet scale; possible score range 0-14. The Mediterranean Diet questionnaire will be given at each participant visit with the dietitians and at baseline, post, and at 3-month follow up | 9 months |
| Measure | Description | Time Frame |
|---|---|---|
| Physical activity | Daily step count is measured with Fitbit that was worn over seven days. Physical activity are measured at baseline, post-intervention, and 3-month follow up. | 9 months |
| Body mass index (BMI) |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| World Trade Center Health Program Clinic | Commack | New York | 11725 | United States |
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| Usual Care | Behavioral | As part of usual care, members attended one-on-one monthly counseling sessions with the assigned dietitian and reviewed their current eating habits and physical activity, as well as other environmental factors that may be affecting their weight such as work, home environment, sleeping issues, and medications. After reviewing current practices, the RD provided medical nutrition therapy (MNT), a specific application of the Nutrition Care Process in clinical settings that focuses on the management of diseases (e.g. diabetes, heart disease, etc.). Specific dietary recommendations are based on the Bull's Eye Food Guide, used by Stony Brook University Hospital for outpatient nutrition counseling. Individuals in the standard care received more individualized calorie recommendations (usual care) than the Mediterranean diet group. |
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Body mass index (weight/height square) will be objectively measured at baseline, post intervention and at 3-month follow up.
Body mass index: weight in kilograms/square of height in meters
| 9 months |
| Waist Circumference | Waist circumference is measured at baseline, post-intervention, and 3-month follow up. Waist circumference cut off (Women>88cm; Men>102 cm) | 9 months |
| Total cholesterol | Total cholesterol is measured at baseline, post-intervention, and at 3-months follow-up; reference range: 125 to 200mg/dL | 9 months |
| oxidized LDL | Serum oxLDL is measured at baseline, post-intervention, and at 3-months follow-up; reference range: 10-170 ng/mL | 9 months |
| HDL cholesterol | Serum HDL cholesterol was measured at baseline, post-intervention, and at 3-months follow-up; At risk Men: Less than 40 mg/dL (1.0 mmol/L) Women: Less than 50 mg/dL (1.0 mmol/L) | 9 months |
| Omega 3 fatty acid | Serum or plasma Free (Nonester) Fatty Acids Measured at baseline, post-intervention, and at 3-months follow-up. reference range: Optimal >3.2 % Moderate 2.2-3.2 % High <2.2 % | 9 months |
| Omega 6 to omega 3 ratio | Omega 6 is measured at baseline, post-intervention, and at 3-months follow-up; Omega 6/omega 3 ratio: Reference range: 5.7-21.3 (the lower the better) | 9 months |
| HA1c | Serum Hemoglobin A1C (hA1C) is measured at baseline, post-intervention, and 3-month follow up. hA1C: Normal: <5.7% | 9 months |
| Cytokines | The following cytokines will be measured: FNɣ, IL-1β, IL-4, IL-5, IL-6, IL-8, IL-10, IL-12p70, IL-22 and TNFα, high-sensitivity C-reactive protein (hs-CRP) at >3mg/L. The cytokines will be measured at two time points at baseline and post-intervention. | 6 months |
| Psychosocial questionnaire | A total of 40 questions will be used to assess sedentary behaviors, home food availability, social support, self-efficacy, perceived barriers to adhering to lifestyle behaviors reflecting the behavioral strategies that will be addressed in the proposed intervention. The survey will be completed online at baseline, post-intervention and at 3-month follow up. | 9 months |
| PCL score | Post Traumatic Stress Disorder symptoms will be tested with a PCL score. PCL is a 20-item self-report measure of current (past month) PTSD symptoms based on the DSM-V criteria. PCL will be measured at baseline, post intervention and at 3-month follow up | 9 months |
| ID | Term |
|---|---|
| D013313 | Stress Disorders, Post-Traumatic |
| D050177 | Overweight |
| D009765 | Obesity |
| D024821 | Metabolic Syndrome |
| D007249 | Inflammation |
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D040921 | Stress Disorders, Traumatic |
| D000068099 | Trauma and Stressor Related Disorders |
| D001523 | Mental Disorders |
| D044343 | Overnutrition |
| D009748 | Nutrition Disorders |
| D009750 | Nutritional and Metabolic Diseases |
| D001835 | Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D007333 | Insulin Resistance |
| D006946 | Hyperinsulinism |
| D044882 | Glucose Metabolism Disorders |
| D008659 | Metabolic Diseases |
| D010335 | Pathologic Processes |
| D001519 | Behavior |
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| ID | Term |
|---|---|
| D038441 | Diet, Mediterranean |
| D015444 | Exercise |
| D004035 | Diet Therapy |
| ID | Term |
|---|---|
| D000095500 | Diet, Plant-Based |
| D044623 | Nutrition Therapy |
| D013812 | Therapeutics |
| D004032 | Diet |
| D009747 | Nutritional Physiological Phenomena |
| D000066888 | Diet, Food, and Nutrition |
| D010829 | Physiological Phenomena |
| D009043 | Motor Activity |
| D009068 | Movement |
| D009142 | Musculoskeletal Physiological Phenomena |
| D055687 | Musculoskeletal and Neural Physiological Phenomena |
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