Study Results
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Basic Information
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COMPLETED
NA
232 participants
INTERVENTIONAL
2016-11-25
2023-06-23
Brief Summary
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Detailed Description
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Those selected will be randomly assigned to receive advice in one of four experimental arms: 1) Portfolio Plus diet and intensive increased physical activity program, 2) Portfolio Plus diet and a copy of Health Canada Physical Activity Guidelines with advice to increase physical activity, 3) DASH-like diet and an intensive increased physical activity program and 4) DASH-like diet and a copy of Health Canada Physical Activity Guidelines with advice to increase physical activity. The results of the study will have a major influence on dietary and exercise guidelines for coronary heart disease (CH risk reduction and provide evidence for the larger international trial that will focus on hard endpoints, myocardial infarction (MI) and CHD events). It is hoped that this cohort of participants will continue on and form part of the planned 9 year hard end point (MACE) study if funded.
Prior to starting treatments, participants will undergo screening ultrasound examination of both right and left carotids to enable selection of those individuals whose intima-media thickness (IMT) would be 5-30% below the cut point considered by the Mannheim Consensus as relevant arterial thickening to ensure a relatively low risk group, yet with some measurable arterial thickening.
It will be emphasized at the outset that both the dietary portfolio and the DASH-like diets have been associated with benefits in terms of cholesterol reduction to provide equal encouragement for all study arms. Portfolio and DASH-like dietary advice will consist of half hour individual sessions with the dietitian at baseline, and at 3-month intervals throughout the trial except for the first month when dietary advice will be reinforced, every 2 weeks, by telephone call to the participant or participant visit to the clinic. Prior to starting each diet, instruction will be given on achieving the dietary goals. At follow-up visits, the participants' completed 7-day diet records will be discussed and the original advice reinforced.
For the treatments with intensive increased physical activity the standardized physical activity/exercise component will be supervised by trained kinesiologists (exercise physiologists) for the 4 visits followed by monthly phone calls for the first year for the exercise component, when the major exercise training is provided. 7-day Exercise diaries will be collected at each visit. Using well-established procedures standardized across centers by the Quebec Heart and Lung Institute, the baseline visit will be used to provide a broad qualitative assessment of participants' lifestyle habits and preferences. Standardized physical activity questionnaires will be completed and participants will be asked to wear a pedometer for seven days prior to the intervention to quantify baseline physical activity (daily step count Cardiorespiratory fitness (CRF) is assessed using a submaximal treadmill test adapted from a progressive submaximal power output test performed on a cycle ergometer. The protocol begins with a warm-up workload of 2.5 mph with a 0% slope. The second stage is performed at a speed of 3.5 mph with a 2% slope. The third stage is adjusted in an attempt to reach 75% of the age-estimated maximal heart rate (HR). If necessary, a 4th stage is performed. Estimated VO2max is predicted by extrapolation to age-predicted maximal heart rate at a standardized submaximal treadmill stage (3.5 mph, 2% slope) and estimated maximal oxygen consumption (VO2max) are the variables considered as indicators of CRF in the present study.
For treatments with routine advice to increase physical activity, Health Canada Physical Activity Guidelines for adults 18-64 years or for older adults 65 years \& older will be provided. They will be seen at the start and the end of each year for their formal exercise testing and will bring with them completed physical activities questionnaires. They will receive no other physical activities instruction.
Every effort will be made to obtain study blood samples and carotid imaging data from all subjects at the designated times regardless of adherence to the dietary aspects of the study protocol. All subjects will be included in the intention-to-treat analysis.
Conditions
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Study Design
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RANDOMIZED
FACTORIAL
TREATMENT
DOUBLE
Study Groups
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Portfolio diet and structured exercise
Participants will receive advice on a therapeutic diet appropriate for hypercholesterolemia (ie \<7% of energy from saturated fat, \<200mg/d cholesterol) PLUS the combination of viscous fibres, soy protein, plant sterols and nuts, 5% extra monounsaturated fat, and selection of low glycemic index foods and be instructed on a standardized physical activity/exercise component supervised by kinesiologists.
Portfolio diet and structured exercise
Diet: Foods will contribute 9 g/1000 kcal viscous fibre as β-glucan (oats, barley and oat bran breads) and psyllium (cereal), 1 g plant sterol/1000 kcal diet (in sterol margarine), 22.5 g soy protein/1000 kcal (soy burgers and other soy meat analogues, soy milks, yogurts and cheese) and 22.5 g nuts/1000 kcal and increased MUFA (as olive and canola oils, avocados, nuts etc.). The glycemic index will be reduced from 83 to 70 GI units (bread scale).
Exercise: A program encouraging 150 minutes of exercise, based on the Quebec Heart and Lung Institute exercise program. A short submaximal treadmill test will be used to assess cardiorespiratory fitness. A kinesiologist will work with participants using behavioral strategies to achieve the target of 150 min/week of physical activity or exercise in 3 or 5 sessions weekly (vigorous, moderate or mild depending on goals and tolerance). The target goal will be at least 10,000 steps daily.
DASH-like diet and structured exercise
Participants will receive advice to follow a DASH-like diet of whole grains, and low-fat dairy products with fruits and vegetables and a be instructed on the Laval exercise program-a standardized physical activity/exercise component supervised by trained kinesiologists (exercise physiologists).
DASH-like diet and structured exercise
Diet: Participants will be encouraged to follow a diet of whole grain foods (brown rice, whole wheat breads, muffins and breakfast cereals), reduce meat consumption, choose low fat dairy foods and a control margarine.
Exercise: A physical activity/exercise program encouraging 150 minutes of exercise, based on the exercise program developed at the Quebec Heart and Lung Institute. A short submaximal treadmill test will be used to assess cardiorespiratory fitness. A kinesiologist will work with participants using behavioral strategies to develop and support a plan that aims to achieve the target of 150 min/week of physical activity or exercise in 3 or 5 sessions weekly (vigorous, moderate or mild depending of goals and tolerance) in keeping with maximum achievable goals of participants. The target goal will be at least 10,000 steps daily recorded on their pedometers.
Portfolio diet and routine exercise
Participants will receive advice that will conform to the current therapeutic diet appropriate for hypercholesterolemia (ie \<7% of energy from saturated fat, \<200mg/d cholesterol) PLUS the combination of viscous fibres, soy protein, plant sterols and nuts, 5% extra monounsaturated fat, and selection of low glycemic index foods and will be provided with a copy of Health Canada Physical Activity Guidelines with advice to increase physical activity.
Portfolio diet and routine exercise
Diet: Foods on the dietary portfolio plan will contribute 9 g/1000 kcal viscous fibre as β-glucan (oats, barley and oat bran breads) and psyllium (cereal), 1 g plant sterol/1000 kcal diet (in sterol margarine), 22.5 g soy protein/1000 kcal (soy burgers and other soy meat analogues, soy milks, yogurts and cheese) and 22.5 g peanuts or equivalent of tree nuts/1000 kcal (Table 1A) and increased MUFA (as olive and canola oils, avocados, nuts etc.). The glycemic index will be reduced from 83 to 70 GI units (bread scale).
Exercise: Participants in this group will receive standard of care for individuals being seen by a general practitioner. They will be advised to achieve the current recommended targets for daily physical activity and educational material published by Health Canada (Canada's Physical Activity Guide, Health Canada). They will undergo treadmill tests at the start and end of each 1 year period. They will not receive the more frequent, targeted visits with a kinesiologist.
DASH-like diet and routine exercise
Participants will receive advice to follow a DASH-like diet of whole grains, and low-fat dairy products with fruits and vegetables and will be provided with a copy of Health Canada Physical Activity Guidelines with advice to increase physical activity.
DASH-like diet and routine exercise
Diet: Participants will be encouraged to follow a diet of whole grain foods (brown rice, whole wheat breads, muffins and breakfast cereals), reduce meat consumption, choose low fat dairy foods and a control margarine.
Exercise: Participants in this group will receive standard of care for individuals being seen by a general practitioner. They will be advised to achieve the current recommended targets for daily physical activity and educational material published by Health Canada (Canada's Physical Activity Guide, Health Canada). They will undergo treadmill tests at the start and end of each 1 year period. They will not receive the more frequent, targeted visits with a kinesiologist.
Interventions
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Portfolio diet and structured exercise
Diet: Foods will contribute 9 g/1000 kcal viscous fibre as β-glucan (oats, barley and oat bran breads) and psyllium (cereal), 1 g plant sterol/1000 kcal diet (in sterol margarine), 22.5 g soy protein/1000 kcal (soy burgers and other soy meat analogues, soy milks, yogurts and cheese) and 22.5 g nuts/1000 kcal and increased MUFA (as olive and canola oils, avocados, nuts etc.). The glycemic index will be reduced from 83 to 70 GI units (bread scale).
Exercise: A program encouraging 150 minutes of exercise, based on the Quebec Heart and Lung Institute exercise program. A short submaximal treadmill test will be used to assess cardiorespiratory fitness. A kinesiologist will work with participants using behavioral strategies to achieve the target of 150 min/week of physical activity or exercise in 3 or 5 sessions weekly (vigorous, moderate or mild depending on goals and tolerance). The target goal will be at least 10,000 steps daily.
DASH-like diet and structured exercise
Diet: Participants will be encouraged to follow a diet of whole grain foods (brown rice, whole wheat breads, muffins and breakfast cereals), reduce meat consumption, choose low fat dairy foods and a control margarine.
Exercise: A physical activity/exercise program encouraging 150 minutes of exercise, based on the exercise program developed at the Quebec Heart and Lung Institute. A short submaximal treadmill test will be used to assess cardiorespiratory fitness. A kinesiologist will work with participants using behavioral strategies to develop and support a plan that aims to achieve the target of 150 min/week of physical activity or exercise in 3 or 5 sessions weekly (vigorous, moderate or mild depending of goals and tolerance) in keeping with maximum achievable goals of participants. The target goal will be at least 10,000 steps daily recorded on their pedometers.
Portfolio diet and routine exercise
Diet: Foods on the dietary portfolio plan will contribute 9 g/1000 kcal viscous fibre as β-glucan (oats, barley and oat bran breads) and psyllium (cereal), 1 g plant sterol/1000 kcal diet (in sterol margarine), 22.5 g soy protein/1000 kcal (soy burgers and other soy meat analogues, soy milks, yogurts and cheese) and 22.5 g peanuts or equivalent of tree nuts/1000 kcal (Table 1A) and increased MUFA (as olive and canola oils, avocados, nuts etc.). The glycemic index will be reduced from 83 to 70 GI units (bread scale).
Exercise: Participants in this group will receive standard of care for individuals being seen by a general practitioner. They will be advised to achieve the current recommended targets for daily physical activity and educational material published by Health Canada (Canada's Physical Activity Guide, Health Canada). They will undergo treadmill tests at the start and end of each 1 year period. They will not receive the more frequent, targeted visits with a kinesiologist.
DASH-like diet and routine exercise
Diet: Participants will be encouraged to follow a diet of whole grain foods (brown rice, whole wheat breads, muffins and breakfast cereals), reduce meat consumption, choose low fat dairy foods and a control margarine.
Exercise: Participants in this group will receive standard of care for individuals being seen by a general practitioner. They will be advised to achieve the current recommended targets for daily physical activity and educational material published by Health Canada (Canada's Physical Activity Guide, Health Canada). They will undergo treadmill tests at the start and end of each 1 year period. They will not receive the more frequent, targeted visits with a kinesiologist.
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* men over 21 years
* post-menopausal women
Having a BMI less than or equal to 40 kg/m2 and who have measurable arterial thickening (\>/=1.2mm) at screening as assessed by ultrasound.
They will include those who have at least 1 of the following characteristics:
1. Type 2 diabetes
2. Non-diabetic subjects post MI or post percutaneous coronary intervention (angioplasty) on statin therapy;
3. Hyper-cholesterolemic and treated with statins or have been prescribed statins but are not taking it because they are either unable (intolerant) or unwilling to take statin drugs.
4. Raised blood pressure, \>140/90 (untreated)
Exclusion Criteria
* cardiovascular disease that precludes exercise e.g.
* recent stroke or
* recent myocardial infarction or
* cardiac condition that severely compromises normal function:
* mitral valve disease, atrial fibrillation and individuals with Implantable Cardioverter Defibrillator (ICD)
* heart failure--grades 2-4 (based on New York Heart Association classification),
* severe angina sufficient to prevent any form of physical activity
* other conditions preventing exercise.
* secondary causes of hypercholesterolemia e.g. hypothyroidism (unless treated and on a stable dose of L-thyroxin), clinically significant renal (that precludes dietary change) or liver disease .
* LDL-cholesterol \<1.4mmol/L
* uncontrolled blood pressure
* major disability
* disorder requiring continuous medical attention (on Coumadin) and treatment, such as:
* chronic heart failure
* liver disease
* renal failure or
* cancer (except non-melanoma skin cancer--basal cell, squamous cell)
* chronic infections (bacterial or viral)
* chronic inflammatory diseases (eg. lupus, ulcerative colitis, crohn's disease, celiac disease or gluten sensitivity)
* other autoimmune disease
* major surgery \<6 months prior to randomization
* newly diagnosed with diabetes (\<3 months)
* alcohol consumption \>3 drinks/d
* not suitable for MRI examination because of metal implants or claustrophobia
* food allergies or sensitivity to study foods or study food components (eg. tree nuts, peanuts, soy, wheat, gluten, oats, eggs, milk)
* already following a portfolio-like diet (and are not prepared to change) or have a structured exercise program which they cannot increase any further
* do not have a family doctor
21 Years
ALL
No
Sponsors
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Canadian Institutes of Health Research (CIHR)
OTHER_GOV
University of Toronto
OTHER
Laval University
OTHER
University of Manitoba
OTHER
University of British Columbia
OTHER
Unity Health Toronto
OTHER
Responsible Party
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Principal Investigators
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David Jenkins, MD
Role: PRINCIPAL_INVESTIGATOR
Risk Factor Modification Centre, St. Michael's Hospital
Benoit Lamarche, PhD
Role: STUDY_DIRECTOR
Laval University
Peter Jones, PhD
Role: STUDY_DIRECTOR
University of Manitoba
Jiri Frohlich, MD
Role: STUDY_DIRECTOR
University of British Columbia
Locations
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Healthy Heart Lipid Clinic, St. Paul's Hospital
Vancouver, British Columbia, Canada
Richardson Centre for Functional Foods and Nutraceuticals, University of Manitoba
Winnipeg, Manitoba, Canada
Risk Factor Modification Centre, St. Michael's Hospital
Toronto, Ontario, Canada
Institute of Nutraceuticals and Functional Foods, Laval University
Québec, Quebec, Canada
Countries
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References
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Krauss RM, Eckel RH, Howard B, Appel LJ, Daniels SR, Deckelbaum RJ, Erdman JW Jr, Kris-Etherton P, Goldberg IJ, Kotchen TA, Lichtenstein AH, Mitch WE, Mullis R, Robinson K, Wylie-Rosett J, St Jeor S, Suttie J, Tribble DL, Bazzarre TL. AHA Dietary Guidelines: revision 2000: A statement for healthcare professionals from the Nutrition Committee of the American Heart Association. Circulation. 2000 Oct 31;102(18):2284-99. doi: 10.1161/01.cir.102.18.2284. No abstract available.
Anderson TJ, Gregoire J, Hegele RA, Couture P, Mancini GB, McPherson R, Francis GA, Poirier P, Lau DC, Grover S, Genest J Jr, Carpentier AC, Dufour R, Gupta M, Ward R, Leiter LA, Lonn E, Ng DS, Pearson GJ, Yates GM, Stone JA, Ur E. 2012 update of the Canadian Cardiovascular Society guidelines for the diagnosis and treatment of dyslipidemia for the prevention of cardiovascular disease in the adult. Can J Cardiol. 2013 Feb;29(2):151-67. doi: 10.1016/j.cjca.2012.11.032.
Ornish D, Scherwitz LW, Billings JH, Brown SE, Gould KL, Merritt TA, Sparler S, Armstrong WT, Ports TA, Kirkeeide RL, Hogeboom C, Brand RJ. Intensive lifestyle changes for reversal of coronary heart disease. JAMA. 1998 Dec 16;280(23):2001-7. doi: 10.1001/jama.280.23.2001.
Jenkins DJ, Chiavaroli L, Wong JM, Kendall C, Lewis GF, Vidgen E, Connelly PW, Leiter LA, Josse RG, Lamarche B. Adding monounsaturated fatty acids to a dietary portfolio of cholesterol-lowering foods in hypercholesterolemia. CMAJ. 2010 Dec 14;182(18):1961-7. doi: 10.1503/cmaj.092128. Epub 2010 Nov 1.
Jenkins DJ, Kendall CW, McKeown-Eyssen G, Josse RG, Silverberg J, Booth GL, Vidgen E, Josse AR, Nguyen TH, Corrigan S, Banach MS, Ares S, Mitchell S, Emam A, Augustin LS, Parker TL, Leiter LA. Effect of a low-glycemic index or a high-cereal fiber diet on type 2 diabetes: a randomized trial. JAMA. 2008 Dec 17;300(23):2742-53. doi: 10.1001/jama.2008.808.
Jenkins DJ, Kendall CW, Augustin LS, Mitchell S, Sahye-Pudaruth S, Blanco Mejia S, Chiavaroli L, Mirrahimi A, Ireland C, Bashyam B, Vidgen E, de Souza RJ, Sievenpiper JL, Coveney J, Leiter LA, Josse RG. Effect of legumes as part of a low glycemic index diet on glycemic control and cardiovascular risk factors in type 2 diabetes mellitus: a randomized controlled trial. Arch Intern Med. 2012 Nov 26;172(21):1653-60. doi: 10.1001/2013.jamainternmed.70.
Jenkins DJ, Kendall CW, Faulkner D, Vidgen E, Trautwein EA, Parker TL, Marchie A, Koumbridis G, Lapsley KG, Josse RG, Leiter LA, Connelly PW. A dietary portfolio approach to cholesterol reduction: combined effects of plant sterols, vegetable proteins, and viscous fibers in hypercholesterolemia. Metabolism. 2002 Dec;51(12):1596-604. doi: 10.1053/meta.2002.35578.
Borel AL, Nazare JA, Smith J, Almeras N, Tremblay A, Bergeron J, Poirier P, Despres JP. Visceral and not subcutaneous abdominal adiposity reduction drives the benefits of a 1-year lifestyle modification program. Obesity (Silver Spring). 2012 Jun;20(6):1223-33. doi: 10.1038/oby.2011.396. Epub 2012 Jan 19.
Borel AL, Nazare JA, Smith J, Almeras N, Tremblay A, Bergeron J, Poirier P, Despres JP. Improvement in insulin sensitivity following a 1-year lifestyle intervention program in viscerally obese men: contribution of abdominal adiposity. Metabolism. 2012 Feb;61(2):262-72. doi: 10.1016/j.metabol.2011.06.024. Epub 2011 Aug 23.
Pelletier-Beaumont E, Arsenault BJ, Almeras N, Bergeron J, Tremblay A, Poirier P, Despres JP. Normalization of visceral adiposity is required to normalize plasma apolipoprotein B levels in response to a healthy eating/physical activity lifestyle modification program in viscerally obese men. Atherosclerosis. 2012 Apr;221(2):577-82. doi: 10.1016/j.atherosclerosis.2012.01.023. Epub 2012 Jan 20.
Liu S, Willett WC, Stampfer MJ, Hu FB, Franz M, Sampson L, Hennekens CH, Manson JE. A prospective study of dietary glycemic load, carbohydrate intake, and risk of coronary heart disease in US women. Am J Clin Nutr. 2000 Jun;71(6):1455-61. doi: 10.1093/ajcn/71.6.1455.
Pereira MA, O'Reilly E, Augustsson K, Fraser GE, Goldbourt U, Heitmann BL, Hallmans G, Knekt P, Liu S, Pietinen P, Spiegelman D, Stevens J, Virtamo J, Willett WC, Ascherio A. Dietary fiber and risk of coronary heart disease: a pooled analysis of cohort studies. Arch Intern Med. 2004 Feb 23;164(4):370-6. doi: 10.1001/archinte.164.4.370.
Keys A, Aravanis C, Blackburn HW, Van Buchem FS, Buzina R, Djordjevic BD, Dontas AS, Fidanza F, Karvonen MJ, Kimura N, Lekos D, Monti M, Puddu V, Taylor HL. Epidemiological studies related to coronary heart disease: characteristics of men aged 40-59 in seven countries. Acta Med Scand Suppl. 1966;460:1-392. No abstract available.
Shai I, Schwarzfuchs D, Henkin Y, Shahar DR, Witkow S, Greenberg I, Golan R, Fraser D, Bolotin A, Vardi H, Tangi-Rozental O, Zuk-Ramot R, Sarusi B, Brickner D, Schwartz Z, Sheiner E, Marko R, Katorza E, Thiery J, Fiedler GM, Bluher M, Stumvoll M, Stampfer MJ; Dietary Intervention Randomized Controlled Trial (DIRECT) Group. Weight loss with a low-carbohydrate, Mediterranean, or low-fat diet. N Engl J Med. 2008 Jul 17;359(3):229-41. doi: 10.1056/NEJMoa0708681.
Touboul PJ, Hennerici MG, Meairs S, Adams H, Amarenco P, Desvarieux M, Ebrahim S, Fatar M, Hernandez Hernandez R, Kownator S, Prati P, Rundek T, Taylor A, Bornstein N, Csiba L, Vicaut E, Woo KS, Zannad F; Advisory Board of the 3rd Watching the Risk Symposium 2004, 13th European Stroke Conference. Mannheim intima-media thickness consensus. Cerebrovasc Dis. 2004;18(4):346-9. doi: 10.1159/000081812. Epub 2004 Nov 2.
Jenkins DJ, Kendall CW, Faulkner DA, Nguyen T, Kemp T, Marchie A, Wong JM, de Souza R, Emam A, Vidgen E, Trautwein EA, Lapsley KG, Holmes C, Josse RG, Leiter LA, Connelly PW, Singer W. Assessment of the longer-term effects of a dietary portfolio of cholesterol-lowering foods in hypercholesterolemia. Am J Clin Nutr. 2006 Mar;83(3):582-91. doi: 10.1093/ajcn.83.3.582.
The DASH diet. Dietary Approaches to Stop Hypertension. Lippincotts Prim Care Pract. 1998 Sep-Oct;2(5):536-8. No abstract available.
Murie-Fernandez M, Irimia P, Toledo E, Martinez-Vila E, Buil-Cosiales P, Serrano-Martinez M, Ruiz-Gutierrez V, Ros E, Estruch R, Martinez-Gonzalez MA; PREDIMED Investigators. Carotid intima-media thickness changes with Mediterranean diet: a randomized trial (PREDIMED-Navarra). Atherosclerosis. 2011 Nov;219(1):158-62. doi: 10.1016/j.atherosclerosis.2011.06.050. Epub 2011 Jul 6.
Kavanagh ME, Chiavaroli L, Quibrantar SM, Viscardi G, Ramboanga K, Amlin N, Paquette M, Sahye-Pudaruth S, Patel D, Grant SM, Glenn AJ, Ayoub-Charette S, Zurbau A, Josse RG, Malik VS, Kendall CWC, Jenkins DJA, Sievenpiper JL. Acceptability of a Web-Based Health App (PortfolioDiet.app) to Translate a Nutrition Therapy for Cardiovascular Disease in High-Risk Adults: Mixed Methods Randomized Ancillary Pilot Study. JMIR Cardio. 2025 Mar 28;9:e58124. doi: 10.2196/58124.
Provided Documents
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Document Type: Study Protocol
Other Identifiers
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FRN 130278
Identifier Type: OTHER_GRANT
Identifier Source: secondary_id
FRN 129920
Identifier Type: OTHER_GRANT
Identifier Source: secondary_id
REB # 14-316
Identifier Type: -
Identifier Source: org_study_id
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