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- Klinische proef NCT00049933
Hormone Replacement Therapy and Prothrombotic Variants
Studie Overzicht
Toestand
Gedetailleerde beschrijving
BACKGROUND:
Estrogens are prothrombotic. Recently, the Heart and Estrogen/progestin Replacement Study (HERS), renewed interest in the adverse effects of hormone replacement therapy (HRT). In HERS, HRT was no better than placebo at preventing coronary events. In post hoc analyses, treatment was associated with early harm and late benefit. In an American Heart Association funded case-control study, a potential interaction was observed between HRT and the prothrombin G20210A variant on the risk of first myocardial infarction (MI) in post-menopausal women with hypertension.
DESIGN NARRATIVE:
The study has a case-control design. The Group Health Cooperative (GHC) computerized files will be used to identify postmenopausal women, aged 30 to 79 yrs, with incident myocardial infarction (MI) or stroke during 1/2000-12/2004. Population-based controls, sampled from the GHC enrollment files, will be frequency matched to cases by age, calendar year, and treated hypertension. Data collection will include medical-record review, telephone interview of consenting subjects, and venous-blood collection. Standard methods will be used to assay variant alleles. The GHC computerized pharmacy records will serve as the primary source of information about the use of HRT. Data analysis will involve restriction, stratification, and logistic regression. Case-control and case-only analyses are planned. There will be a total of 600 MI cases, 420 stroke cases and 1800 controls.
The primary purpose is to examine the potential interactions of hormone replacement therapy with other procoagulant variants on the risk of cardiovascular events. The main variants of interest are: (la) factor XIIIA Val34Leu; (ib) platelet glycoprotein (PGP) Jib Ile843Ser; (ic) PGP IIIa Leu33Pro; and (id) PGP Ia C807T. The secondary aims include the assessment of other drug-gene, risk-factor-gene or gene-gene interactions on risk: (2a) the interaction between PGP IIb Ser843, PGP lila Leu33Pro and PGP Ia C807T and traditional cardiovascular risk factors such as smoking and obesity on the risk of MI and stroke; (2b) the interaction between three coagulation factor XIII polymorphisms and PAl-1 4G/5G on the risk of stroke in women; and (2c) the interaction between aspirin use and glycoprotein IIIa Leu33Pro on the risk of MI and stroke.
Studietype
Inschrijving (Werkelijk)
Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Bemonsteringsmethode
Studie Bevolking
Beschrijving
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Tijdsspanne |
---|---|
Myocardial Infarction or Stroke
Tijdsspanne: Retrospective
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Retrospective
|
Medewerkers en onderzoekers
Sponsor
Onderzoekers
- Studie stoel: Bruce Psaty, University of Washington
Publicaties en nuttige links
Algemene publicaties
- Psaty BM, Lumley T, Furberg CD, Schellenbaum G, Pahor M, Alderman MH, Weiss NS. Health outcomes associated with various antihypertensive therapies used as first-line agents: a network meta-analysis. JAMA. 2003 May 21;289(19):2534-44. doi: 10.1001/jama.289.19.2534.
- Smith NL, Heckbert SR, Lemaitre RN, Reiner AP, Lumley T, Weiss NS, Larson EB, Rosendaal FR, Psaty BM. Esterified estrogens and conjugated equine estrogens and the risk of venous thrombosis. JAMA. 2004 Oct 6;292(13):1581-7. doi: 10.1001/jama.292.13.1581.
- Tirschwell DL, Smith NL, Heckbert SR, Lemaitre RN, Longstreth WT Jr, Psaty BM. Association of cholesterol with stroke risk varies in stroke subtypes and patient subgroups. Neurology. 2004 Nov 23;63(10):1868-75. doi: 10.1212/01.wnl.0000144282.42222.da.
- Rhoads CS, Psaty BM, Olson JL, Furberg CD. Medications and cardiovascular health in older adults: room for improvement in prevention and treatment. Am J Geriatr Cardiol. 2004 May-Jun;13(3):161-7. doi: 10.1111/j.1076-7460.2004.02124.x. No abstract available.
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- 20425
- 5R01HL068639-04 (Subsidie/contract van de Amerikaanse NIH)
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