Nctid:
NCT00001589
Payload:
{"hasResults"=>false, "derivedSection"=>{"miscInfoModule"=>{"versionHolder"=>"2024-12-20"}, "conditionBrowseModule"=>{"meshes"=>[{"id"=>"D002340", "term"=>"Carotid Artery Diseases"}, {"id"=>"D009203", "term"=>"Myocardial Infarction"}, {"id"=>"D050197", "term"=>"Atherosclerosis"}, {"id"=>"D007238", "term"=>"Infarction"}], "ancestors"=>[{"id"=>"D007511", "term"=>"Ischemia"}, {"id"=>"D010335", "term"=>"Pathologic Processes"}, {"id"=>"D009336", "term"=>"Necrosis"}, {"id"=>"D017202", "term"=>"Myocardial Ischemia"}, {"id"=>"D006331", "term"=>"Heart Diseases"}, {"id"=>"D002318", "term"=>"Cardiovascular Diseases"}, {"id"=>"D014652", "term"=>"Vascular Diseases"}, {"id"=>"D001161", "term"=>"Arteriosclerosis"}, {"id"=>"D001157", "term"=>"Arterial Occlusive Diseases"}, {"id"=>"D002561", "term"=>"Cerebrovascular Disorders"}, {"id"=>"D001927", "term"=>"Brain Diseases"}, {"id"=>"D002493", "term"=>"Central Nervous System Diseases"}, {"id"=>"D009422", "term"=>"Nervous System Diseases"}], "browseLeaves"=>[{"id"=>"M12155", "name"=>"Myocardial Infarction", "asFound"=>"Myocardial Infarction", "relevance"=>"HIGH"}, {"id"=>"M10282", "name"=>"Infarction", "asFound"=>"Infarction", "relevance"=>"HIGH"}, {"id"=>"M26188", "name"=>"Atherosclerosis", "asFound"=>"Atherosclerosis", "relevance"=>"HIGH"}, {"id"=>"M5594", "name"=>"Carotid Artery Diseases", "asFound"=>"Carotid Atherosclerosis", "relevance"=>"HIGH"}, {"id"=>"M10543", "name"=>"Ischemia", "relevance"=>"LOW"}, {"id"=>"M12284", "name"=>"Necrosis", "relevance"=>"LOW"}, {"id"=>"M6546", "name"=>"Coronary Artery Disease", "relevance"=>"LOW"}, {"id"=>"M19506", "name"=>"Myocardial Ischemia", "relevance"=>"LOW"}, {"id"=>"M9419", "name"=>"Heart Diseases", "relevance"=>"LOW"}, {"id"=>"M17400", "name"=>"Vascular Diseases", "relevance"=>"LOW"}, {"id"=>"M4469", "name"=>"Arteriosclerosis", "relevance"=>"LOW"}, {"id"=>"M4465", "name"=>"Arterial Occlusive Diseases", "relevance"=>"LOW"}, {"id"=>"M5810", "name"=>"Cerebrovascular Disorders", "relevance"=>"LOW"}, {"id"=>"M5204", "name"=>"Brain Diseases", "relevance"=>"LOW"}, {"id"=>"M5742", "name"=>"Central Nervous System Diseases", "relevance"=>"LOW"}], "browseBranches"=>[{"name"=>"Heart and Blood Diseases", "abbrev"=>"BC14"}, {"name"=>"Symptoms and General Pathology", "abbrev"=>"BC23"}, {"name"=>"All Conditions", "abbrev"=>"All"}, {"name"=>"Nervous System Diseases", "abbrev"=>"BC10"}]}}, "protocolSection"=>{"designModule"=>{"studyType"=>"OBSERVATIONAL", "enrollmentInfo"=>{"count"=>120}}, "statusModule"=>{"overallStatus"=>"COMPLETED", "startDateStruct"=>{"date"=>"1997-04"}, "expandedAccessInfo"=>{"hasExpandedAccess"=>false}, "statusVerifiedDate"=>"2002-05", "completionDateStruct"=>{"date"=>"2002-05"}, "lastUpdateSubmitDate"=>"2008-03-03", "studyFirstSubmitDate"=>"1999-11-03", "studyFirstSubmitQcDate"=>"1999-11-03", "lastUpdatePostDateStruct"=>{"date"=>"2008-03-04", "type"=>"ESTIMATED"}, "studyFirstPostDateStruct"=>{"date"=>"1999-11-04", "type"=>"ESTIMATED"}}, "conditionsModule"=>{"keywords"=>["Ferritin", "Atherosclerosis", "Myocardial Infarction", "Blood Donors", "Low Density Lipoprotein", "Asymptomatic Carotid Atherosclerosis"], "conditions"=>["Carotid Atherosclerosis", "Myocardial Infarction"]}, "referencesModule"=>{"references"=>[{"pmid"=>"7718033", "type"=>"BACKGROUND", "citation"=>"Fuster V. Lewis A. Conner Memorial Lecture. Mechanisms leading to myocardial infarction: insights from studies of vascular biology. Circulation. 1994 Oct;90(4):2126-46. doi: 10.1161/01.cir.90.4.2126. Erratum In: Circulation 1995 Jan 1;91(1):256."}, {"pmid"=>"8185133", "type"=>"BACKGROUND", "citation"=>"Rader DJ, Hoeg JM, Brewer HB Jr. Quantitation of plasma apolipoproteins in the primary and secondary prevention of coronary artery disease. Ann Intern Med. 1994 Jun 15;120(12):1012-25. doi: 10.7326/0003-4819-120-12-199406150-00008."}, {"pmid"=>"7586324", "type"=>"BACKGROUND", "citation"=>"Kannel WB. Clinical misconceptions dispelled by epidemiological research. Circulation. 1995 Dec 1;92(11):3350-60. doi: 10.1161/01.cir.92.11.3350."}]}, "descriptionModule"=>{"briefSummary"=>"Iron has been proposed to contribute to atherogenesis in humans by facilitating the oxidation of lipoproteins. This observational study will evaluate the association between frequency of blood donation - expected to be associated with relatively reduced body iron stores in frequent donors - and carotid atherosclerosis. The primary outcome variable will be whether the presence and extent of asymptomatic carotid atherosclerosis as measured by ultrasound is greater in infrequent (less than or equal to 1 donations/year greater than or equal to 5 years) vs. frequent (greater than or equal to 4 donations/year greater than or equal to 5 years) blood donors. Body iron stores, lipid and hemostatic parameters, nitric oxide formation, inflammatory parameters, and markers of vascular oxidative stress will be analyzed as secondary outcome measures. Laboratory analysis and ultrasound testing will be performed blinded to the patient's phlebotomy and iron status. Sixty frequent (n=40 males greater than 40 y/o, n=20 females greater than 50 y/o) and 60 infrequent (n=40 males greater than 40 y/o, n=20 females greater than 50 y/o) blood donors will be recruited for this study from the Department of Transfusion Medicine, W. G. Magnuson Clinical Center. All donors will be assessed for study eligibility and cardiovascular risks during the screening visit. The presence of atherosclerotic lesions by carotid ultrasound and secondary outcome parameters will be assessed during a second visit.", "detailedDescription"=>"Iron has been proposed to contribute to atherogenesis in humans by facilitating the oxidation of lipoproteins. This observational study will evaluate the association between frequency of blood donation - expected to be associated with relatively reduced body iron stores in frequent donors - and carotid atherosclerosis. The primary outcome variable will be whether the presence and extent of asymptomatic carotid atherosclerosis as measured by ultrasound is greater in infrequent (less than or equal to 1 donations/year greater than or equal to 5 years) vs. frequent (greater than or equal to 4 donations/year greater than or equal to 5 years) blood donors. Body iron stores, lipid and hemostatic parameters, nitric oxide formation, inflammatory parameters, and markers of vascular oxidative stress will be analyzed as secondary outcome measures. Laboratory analysis and ultrasound testing will be performed blinded to the patient's phlebotomy and iron status. Sixty frequent (n=40 males greater than 40 y/o, n=20 females greater than 50 y/o) and 60 infrequent (n=40 males greater than 40 y/o, n=20 females greater than 50 y/o) blood donors will be recruited for this study from the Department of Transfusion Medicine, W. G. Magnuson Clinical Center. All donors will be assessed for study eligibility and cardiovascular risks during the screening visit. The presence of atherosclerotic lesions by carotid ultrasound and secondary outcome parameters will be assessed during a second visit."}, "eligibilityModule"=>{"sex"=>"ALL", "stdAges"=>["CHILD", "ADULT", "OLDER_ADULT"], "healthyVolunteers"=>true, "eligibilityCriteria"=>"INCLUSION CRITERIA:\n\nAge greater than or equal to 40 years for males and greater than or equal to 50 years for females.\n\nStandard eligibility criteria for blood donation, per guidelines established by the Food and Drug Administration and the American Association of Blood Banks.\n\nAbility to provide consent after full information is provided.\n\nEXCLUSION CRITERIA:\n\nPregnancy or lactation.\n\nPatients with clinically significant dementia or psychiatric disturbances, including alcohol and substance abuse.\n\nPresence of the following American Heart Association cardiovascular risks: diabetes mellitus, hypertension (systolic greater than 140 mmHg, diastolic greater than 90 mmHg), smoking (greater than 10 cigarettes/day), high density lipoprotein cholesterol less than 35 mg/dL, hyperlipidemia (total cholesterol greater than 240 mg/dL), family history of premature coronary heart disease.\n\nAnticoagulant, thrombolytic, hemorrheologic and/or antiplatelet agents (within the last 10 days).\n\nAny other condition or therapy which in the opinion of the investigators may pose a risk to the patient or confound the results of the study."}, "identificationModule"=>{"nctId"=>"NCT00001589", "briefTitle"=>"Comparison of Asymptomatic Carotid Atherosclerosis Between Frequent and Infrequent Blood Donors", "organization"=>{"class"=>"NIH", "fullName"=>"National Institutes of Health Clinical Center (CC)"}, "officialTitle"=>"Comparison of Asymptomatic Carotid Atherosclerosis Between Frequent and Infrequent Blood Donors", "orgStudyIdInfo"=>{"id"=>"970113"}, "secondaryIdInfos"=>[{"id"=>"97-CC-0113"}]}, "contactsLocationsModule"=>{"locations"=>[{"zip"=>"20892", "city"=>"Bethesda", "state"=>"Maryland", "country"=>"United States", "facility"=>"Warren G. Magnuson Clinical Center (CC)", "geoPoint"=>{"lat"=>38.98067, "lon"=>-77.10026}}]}, "sponsorCollaboratorsModule"=>{"leadSponsor"=>{"name"=>"National Institutes of Health Clinical Center (CC)", "class"=>"NIH"}}}}
