Evaluating the Effectiveness of Sildenafil at Improving Health Outcomes and Exercise Ability in People With Diastolic Heart Failure (The RELAX Study) (RELAX)
14 luglio 2014 aggiornato da: Duke University
Phosphodiesterase-5 Inhibition to Improve Clinical Status and Exercise Capacity in Diastolic Heart Failure (RELAX)
Diastolic heart failure (DHF), which affects older individuals and women at a disproportionate rate, is a condition that can lead to shortness of breath and fluid build-up in the lungs.
This study will evaluate the effectiveness of the medication sildenafil at improving exercise ability and health outcomes in people with DHF.
Panoramica dello studio
Stato
Completato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
DHF is a condition in which one of the chambers of the heart, the left ventricle, loses its ability to relax completely because the muscle has become too stiff. When this occurs, the heart is unable to properly fill with blood, which can lead to decreased blood circulation. People with DHF may experience shortness of breath and pulmonary congestion, which is an abnormal build-up of fluid in the lungs. Current treatment for DHF includes guidelines/recommendations to lower blood pressure, stop smoking, and lose weight, but there are no medications available to specifically treat DHF. Sildenafil, commonly known as Revatio or Viagra, is a medication that increases the supply of blood to the lungs and reduces the workload of the heart. Preliminary studies have shown that sildenafil may be beneficial at improving heart and lung function in people with DHF, but more research is needed to confirm these findings. The purpose of this study is to determine if sildenafil can improve exercise ability and health outcomes in people with DHF.
This 24-week study will enroll people with DHF. Participants will be randomly assigned to receive either sildenafil or placebo three times a day for 24 weeks. Participants will attend study visits at baseline and Weeks 1, 4, 12, 13, and 24. At most study visits, the following procedures will occur: physical exam, medical history review, questionnaires, blood collection, 6-minute walk test to measure endurance, and an exercise test. At baseline and Week 24, participants will also undergo an electrocardiogram, which will measure the electrical activity of the heart, and a cardiac magnetic resonance imaging (MRI) procedure and an echocardiogram, which will both obtain pictures of the heart. At Weeks 3, 8, 16, and 20, study researchers will call participants to collect health information.
Tipo di studio
Interventistico
Iscrizione (Effettivo)
216
Fase
- Fase 3
Contatti e Sedi
Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.
Luoghi di studio
-
-
Quebec
-
Montreal, Quebec, Canada, H1T - 1C8
- Montreal Heart Institute
-
-
-
-
Arizona
-
Phoenix, Arizona, Stati Uniti, 85054
- Mayo Clinic Arizona
-
-
Georgia
-
Atlanta, Georgia, Stati Uniti, 30310
- Morehouse School of Medicine
-
-
Massachusetts
-
Boston, Massachusetts, Stati Uniti, 02115
- Brigham and Women's Hospital
-
-
Minnesota
-
Minneapolis, Minnesota, Stati Uniti, 55415
- Minnesota Heart Failure Network
-
Rochester, Minnesota, Stati Uniti, 55905
- Mayo Clinic
-
-
North Carolina
-
Durham, North Carolina, Stati Uniti, 27705
- Duke University Medical Center
-
-
Texas
-
Houston, Texas, Stati Uniti, 77030
- Baylor College of Medicine
-
-
Utah
-
Murray, Utah, Stati Uniti, 84107
- University of Utah Health Sciences Center
-
-
Vermont
-
Burlington, Vermont, Stati Uniti, 05401
- University of Vermont - Fletcher Allen Health Care
-
-
Criteri di partecipazione
I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.
Criteri di ammissibilità
Età idonea allo studio
18 anni e precedenti (Adulto, Adulto più anziano)
Accetta volontari sani
No
Sessi ammissibili allo studio
Tutto
Descrizione
Inclusion Criteria:
- Previous clinical diagnosis of heart failure with current New York Heart Association (NYHA) Class II-IV symptoms
Has experienced at least one of the following in the 12 months before study entry:
- Hospitalization for decompensated heart failure
- Acute treatment with intravenous loop diuretic or hemofiltration
- Mean pulmonary capillary wedge pressure greater than 15 mm Hg or left ventricular end diastolic pressure (LVEDP) greater than 18 mm Hg at catheterization for dyspnea
- Long term treatment with a loop diuretic and chronic diastolic dysfunction on echocardiography, as determined by left atrial enlargement
- Left ventricular ejection fraction greater than or equal to 50%, as determined by a clinical echocardiogram or ventriculogram in the 12 months before study entry
- Receiving stable medical therapy in the 30 days before study entry, as determined by no addition or removal of angiotensin converting enzyme inhibitor (ACE), angiotensin receptor blocker (ARB), beta-blockers, or calcium channel blockers (CCB) and no change in dosage of ACE, ARBs, beta-blockers, or CCBs of more than 100%
Exclusion Criteria:
- Has a neuromuscular, orthopedic, or other non-cardiac condition that prevents individual from exercise testing on a bicycle ergometer or from walking in a hallway
- Non-cardiac condition that limits life expectancy to less than 1 year at the time of study entry, based on the judgment of the physician
- Current or anticipated future need for nitrate therapy
- Valve disease (i.e., greater than mild aortic or mitral stenosis; greater than moderate aortic or mitral regurgitation)
- Hypertrophic cardiomyopathy
- Infiltrative or inflammatory myocardial disease (e.g., amyloid, sarcoid)
- Pericardial disease
- Primary pulmonary arteriopathy
- Has experienced a heart attack or unstable angina, or has undergone percutaneous transluminal coronary angiography (PTCA) or coronary artery bypass grafting (CABG) in the 60 days before study entry, or requires either PTCA or CABG at the time of study entry
- Other clinically important causes of dyspnea, such as morbid obesity or significant lung disease, as defined by clinical judgment or use of steroids or oxygen for lung disease
- Systolic blood pressure less than 110 mm Hg or greater than 180 mm Hg
- Diastolic blood pressure less than 40 mm Hg or greater than 100 mm Hg
- Resting heart rate (HR) greater than 100 bpm
- History of reduced ejection fraction (less than 50%)
- Implanted metallic device that will interfere with MRI examination (in people without atrial fibrillation)
- Severe kidney dysfunction (estimated glomerular filtration rate [GFR] less than 20 ml/min/1.73m2 by modified modification of diet in renal disease [MDRD] equation)
- Pregnant or not using an effective form of contraception
- Hemoglobin level of less than 10 g/dL
- Taking alpha antagonists or cytochrome P450 3A4 inhibitors (e.g., ketoconazole, itraconazole, erythromycin, saquinavir, cimetidine, or serum protease inhibitors for HIV)
- Retinitis pigmentosa, previous diagnosis of nonischemic optic neuropathy, untreated proliferative retinopathy, or unexplained visual disturbance
- Sickle cell anemia, multiple myeloma, leukemia, or penile deformities that increase the risk for priapism (e.g., angulation, cavernosal fibrosis, Peyronie's disease)
- Severe liver disease (aspartate aminotransferase [AST] level greater than three times the normal limit, alkaline phosphatase or bilirubin greater than two times the normal limit)
- In being consistent with American College of Cardiology (ACC)/American Heart Association (AHA) guidelines, people with dyspnea and risk factors for coronary artery disease should have had a stress test and those people with a clinically indicated stress test demonstrating significant ischemia in the 1 year before study entry will be excluded.
- Listed for heart transplantation
Piano di studio
Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Triplicare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
|
Comparatore placebo: Placebo
Placebo 20 mg three tid for 12 weeks followed by 60 mg tid for 12 weeks
|
Altri nomi:
|
|
Sperimentale: Sildenafil
Sildenafil 20 mg three tid for 12 weeks followed by 60 mg tid for 12 weeks
|
Altri nomi:
|
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Lasso di tempo |
|---|---|
|
Exercise Capacity, as Determined by Peak Oxygen Uptake
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Exercise Capacity, as Determined by Peak Oxygen Uptake
Lasso di tempo: Change from Baseline to Week 12
|
Change from Baseline to Week 12
|
|
|
Exercise Capacity as Determined by Walk Distance
Lasso di tempo: Change from Baseline to Week 12
|
6 Minute Walk Distance
|
Change from Baseline to Week 12
|
|
Composite Score Reflective of Clinical Status
Lasso di tempo: Measured at Week 24
|
Participants ranked sequentially with ranking stratified in one of three tiers based on:
The use of three tiers within the ranking reflects the greater adverse impact of death or cardiovascular hospitalization on clinical status without an arbitrary assignment as to the relative value of these events in relation to changes in quality of life. Rank order: 1-189 (higher values are better) |
Measured at Week 24
|
|
Exercise Capacity as Determined by Walk Distance
Lasso di tempo: Change from Baseline to Week 24
|
6 minute walk distance
|
Change from Baseline to Week 24
|
|
Cardiopulmonary Exercise Test (CPET) Duration
Lasso di tempo: Change from Baseline to Week 12
|
To interpret the CPET Exercise Duration change endpoints, an increase in exercise duration between Baseline and Week 12/Week 24 is considered to be an improvement
|
Change from Baseline to Week 12
|
|
Cardiopulmonary Exercise Test (CPET) Duration
Lasso di tempo: Change from Baseline to Week 24
|
To interpret the CPET Exercise Duration change endpoints, an increase in exercise duration between Baseline and Week 12/Week 24 is considered to be an improvement
|
Change from Baseline to Week 24
|
|
Ventilatory Anaerobic Threshold
Lasso di tempo: Change from Baseline to Week 12
|
To interpret the Ventilatory Anaerobic Threshold (VAT) change endpoints, an increase in VAT between Baseline and Week 12/Week 24 is considered to be an improvement
|
Change from Baseline to Week 12
|
|
Ventilatory Anaerobic Threshold
Lasso di tempo: Change from Baseline to Week 24
|
To interpret the Ventilatory Anaerobic Threshold (VAT) change endpoints, an increase in VAT between Baseline and Week 12/Week 24 is considered to be an improvement
|
Change from Baseline to Week 24
|
|
Minnesota Living With Heart Failure Questionnaire (MLWHFQ)
Lasso di tempo: Change from Baseline to Week 12
|
The MLWHFQ is a self-administered, disease-specific measure of health related quality of life (QOL) that assesses patients perceptions of the influence of heart failure on physical, socioeconomic and psychological aspects of life. Patients respond to 21 items using a six-point response scale (0-5). The total summary score can range from 0-105 with a lower score reflecting better heart failure related QOL. Two sub-scale scores reflect physical (8 items) and emotional (5 items) impairment. Total score: 0 - 105 Physical subscore: 0 - 40 Emotional subscore: 0 - 25 |
Change from Baseline to Week 12
|
|
Minnesota Living With Heart Failure Questionnaire
Lasso di tempo: Change from Baseline to Week 24
|
The MLWHFQ is a self-administered, disease-specific measure of health related quality of life (QOL) that assesses patients perceptions of the influence of heart failure on physical, socioeconomic and psychological aspects of life.
Patients respond to 21 items using a six-point response scale (0-5).
The total summary score can range from 0-105 with a lower score reflecting better heart failure related QOL.
Two sub-scale scores reflect physical (8 items) and emotional (5 items) impairment.
|
Change from Baseline to Week 24
|
Altre misure di risultato
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
MRI Left Ventricular Mass
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in LV Mass is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Left Ventricular Mass Index
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Left Ventricular Mass Index is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Left Ventricular End Diastolic Volume
Lasso di tempo: Change from Baseline to Week 24
|
An increase in Left Ventricular End Diastolic Volume is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Left Ventricular End Diastolic Volume Index
Lasso di tempo: Change from Baseline to Week 24
|
An increase in Left Ventricular End Diastolic Volume Index is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Left Ventricular End Systolic Volume Index
Lasso di tempo: Change from Baseline to Week 24
|
An increase in Left Ventricular End Systolic Volume Index is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Left Ventricular Ejection Fraction (LVEF)
Lasso di tempo: Change from Baseline to Week 24
|
An increase in LVEF is considered an improvement
|
Change from Baseline to Week 24
|
|
Echocardiogram Left Ventricular Mass
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Left Ventricular Mass is considered an improvement
|
Change from Baseline to Week 24
|
|
Medial Diastolic Elastance
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Medial Diastolic Elastance is considered an improvement
|
Change from Baseline to Week 24
|
|
Lateral Diastolic Elastance
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Lateral Diastolic Elastance is considered an improvement
|
Change from Baseline to Week 24
|
|
Medial Left Ventricular Relaxation
Lasso di tempo: Change from Baseline to Week 24
|
An increase in Left Ventricular relaxation is considered to be an improvement
|
Change from Baseline to Week 24
|
|
Lateral Left Ventricular Relaxation
Lasso di tempo: Change from Baseline to Week 24
|
An increase in Left Ventricular relaxation is considered to be an improvement
|
Change from Baseline to Week 24
|
|
Medial Filling Pressure
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in medial filling pressure is considered an improvement
|
Change from Baseline to Week 24
|
|
Lateral Filling Pressure
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in lateral filling pressure is considered an improvement
|
Change from Baseline to Week 24
|
|
ECHO Effective Arterial Elastance
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Effective Arterial Elastance is considered an improvement
|
Change from Baseline to Week 24
|
|
ECHO Systemic Vascular Resistance
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Systemic Vascular Resistance is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Effective Arterial Elastance
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Effective Arterial Elastance is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Systemic Vascular Resistance
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Systemic Vascular Resistance is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Aortic Thickness
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Aortic Thickness is considered an improvement
|
Change from Baseline to Week 24
|
|
MRI Aortic Distensibility
Lasso di tempo: Change from Baseline to Week 24
|
An increase in Aortic Distensibility is considered to be an improvement
|
Change from Baseline to Week 24
|
|
ECHO Pulmonary Artery Systolic Pressure
Lasso di tempo: Change from Baseline to Week 24
|
A decrease in Pulmonary Artery Systolic Pressure is considered to be an improvement
|
Change from Baseline to Week 24
|
|
Best Available Creatinine
Lasso di tempo: Change from Baseline to Week 24
|
Best available=local lab results only when core lab results not available
|
Change from Baseline to Week 24
|
|
Best Available Glomerular Filtration Rate (GFR)
Lasso di tempo: Change from Baseline to Week 24
|
Best available=local lab results when core lab results not available
|
Change from Baseline to Week 24
|
|
Cystatin C
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Uric Acid
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
N-terminal Pro B-type Natriuretic Peptide (NT Pro-BNP)
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Aldosterone
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
High Sensitivity Troponin I
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Procollagen III N-terminal Peptide
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Endothelin-1
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
High Sensitivity C-Reactive Protein
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Collagen Type I (CITP)
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Cyclic Guanosine Monophosphate (cGMP)
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Galectin 3
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
|
|
Furosemide-Equivalent Dose
Lasso di tempo: Change from Baseline to Week 24
|
Change from Baseline to Week 24
|
Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Sponsor
Pubblicazioni e link utili
La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.
Pubblicazioni generali
- Reddy YNV, Rikhi A, Obokata M, Shah SJ, Lewis GD, AbouEzzedine OF, Dunlay S, McNulty S, Chakraborty H, Stevenson LW, Redfield MM, Borlaug BA. Quality of life in heart failure with preserved ejection fraction: importance of obesity, functional capacity, and physical inactivity. Eur J Heart Fail. 2020 Jun;22(6):1009-1018. doi: 10.1002/ejhf.1788. Epub 2020 Mar 9.
- Redfield MM, Chen HH, Borlaug BA, Semigran MJ, Lee KL, Lewis G, LeWinter MM, Rouleau JL, Bull DA, Mann DL, Deswal A, Stevenson LW, Givertz MM, Ofili EO, O'Connor CM, Felker GM, Goldsmith SR, Bart BA, McNulty SE, Ibarra JC, Lin G, Oh JK, Patel MR, Kim RJ, Tracy RP, Velazquez EJ, Anstrom KJ, Hernandez AF, Mascette AM, Braunwald E; RELAX Trial. Effect of phosphodiesterase-5 inhibition on exercise capacity and clinical status in heart failure with preserved ejection fraction: a randomized clinical trial. JAMA. 2013 Mar 27;309(12):1268-77. doi: 10.1001/jama.2013.2024.
- Bevan GH, Rana M, Al-Furaih N, Dalton J, Zidar DA, Al-Kindi SG. Anisocytosis is associated with myocardial fibrosis and exercise capacity in heart failure with preserved ejection fraction. Heart Lung. 2022 Jul-Aug;54:68-73. doi: 10.1016/j.hrtlng.2022.03.013. Epub 2022 Mar 28.
- Fudim M, Kelly JP, Jones AD, AbouEzzeddine OF, Ambrosy AP, Greene SJ, Reddy YNV, Anstrom KJ, Alhanti B, Lewis GD, Hernandez AF, Felker GM. Are existing and emerging biomarkers associated with cardiorespiratory fitness in patients with chronic heart failure? Am Heart J. 2020 Feb;220:97-107. doi: 10.1016/j.ahj.2019.11.006. Epub 2019 Nov 16.
- Reddy YNV, Lewis GD, Shah SJ, Obokata M, Abou-Ezzedine OF, Fudim M, Sun JL, Chakraborty H, McNulty S, LeWinter MM, Mann DL, Stevenson LW, Redfield MM, Borlaug BA. Characterization of the Obese Phenotype of Heart Failure With Preserved Ejection Fraction: A RELAX Trial Ancillary Study. Mayo Clin Proc. 2019 Jul;94(7):1199-1209. doi: 10.1016/j.mayocp.2018.11.037.
- AbouEzzeddine OF, McKie PM, Dunlay SM, Stevens SR, Felker GM, Borlaug BA, Chen HH, Tracy RP, Braunwald E, Redfield MM. Suppression of Tumorigenicity 2 in Heart Failure With Preserved Ejection Fraction. J Am Heart Assoc. 2017 Feb 18;6(2):e004382. doi: 10.1161/JAHA.116.004382. Erratum In: J Am Heart Assoc. 2017 Sep 20;6(9):
- DeVore AD, McNulty S, Alenezi F, Ersboll M, Vader JM, Oh JK, Lin G, Redfield MM, Lewis G, Semigran MJ, Anstrom KJ, Hernandez AF, Velazquez EJ. Impaired left ventricular global longitudinal strain in patients with heart failure with preserved ejection fraction: insights from the RELAX trial. Eur J Heart Fail. 2017 Jul;19(7):893-900. doi: 10.1002/ejhf.754. Epub 2017 Feb 14.
- Hussain I, Mohammed SF, Forfia PR, Lewis GD, Borlaug BA, Gallup DS, Redfield MM. Impaired Right Ventricular-Pulmonary Arterial Coupling and Effect of Sildenafil in Heart Failure With Preserved Ejection Fraction: An Ancillary Analysis From the Phosphodiesterase-5 Inhibition to Improve Clinical Status And Exercise Capacity in Diastolic Heart Failure (RELAX) Trial. Circ Heart Fail. 2016 Apr;9(4):e002729. doi: 10.1161/CIRCHEARTFAILURE.115.002729.
- Lindman BR, Davila-Roman VG, Mann DL, McNulty S, Semigran MJ, Lewis GD, de las Fuentes L, Joseph SM, Vader J, Hernandez AF, Redfield MM. Cardiovascular phenotype in HFpEF patients with or without diabetes: a RELAX trial ancillary study. J Am Coll Cardiol. 2014 Aug 12;64(6):541-9. doi: 10.1016/j.jacc.2014.05.030.
- Mohammed SF, Borlaug BA, McNulty S, Lewis GD, Lin G, Zakeri R, Semigran MJ, LeWinter M, Hernandez AF, Braunwald E, Redfield MM. Resting ventricular-vascular function and exercise capacity in heart failure with preserved ejection fraction: a RELAX trial ancillary study. Circ Heart Fail. 2014 Jul;7(4):580-9. doi: 10.1161/CIRCHEARTFAILURE.114.001192. Epub 2014 May 15.
- Zakeri R, Borlaug BA, McNulty SE, Mohammed SF, Lewis GD, Semigran MJ, Deswal A, LeWinter M, Hernandez AF, Braunwald E, Redfield MM. Impact of atrial fibrillation on exercise capacity in heart failure with preserved ejection fraction: a RELAX trial ancillary study. Circ Heart Fail. 2014 Jan;7(1):123-30. doi: 10.1161/CIRCHEARTFAILURE.113.000568. Epub 2013 Oct 25.
- Redfield MM, Borlaug BA, Lewis GD, Mohammed SF, Semigran MJ, Lewinter MM, Deswal A, Hernandez AF, Lee KL, Braunwald E; Heart Failure Clinical Research Network. PhosphdiesteRasE-5 Inhibition to Improve CLinical Status and EXercise Capacity in Diastolic Heart Failure (RELAX) trial: rationale and design. Circ Heart Fail. 2012 Sep 1;5(5):653-9. doi: 10.1161/CIRCHEARTFAILURE.112.969071.
Studiare le date dei record
Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.
Studia le date principali
Inizio studio
1 settembre 2008
Completamento primario (Effettivo)
1 settembre 2012
Completamento dello studio (Effettivo)
1 settembre 2012
Date di iscrizione allo studio
Primo inviato
30 settembre 2008
Primo inviato che soddisfa i criteri di controllo qualità
30 settembre 2008
Primo Inserito (Stima)
1 ottobre 2008
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
23 luglio 2014
Ultimo aggiornamento inviato che soddisfa i criteri QC
14 luglio 2014
Ultimo verificato
1 luglio 2013
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- Pro00018007
- U01HL084904 (Sovvenzione/contratto NIH degli Stati Uniti)
- 521
- U01HL084904-01 (Sovvenzione/contratto NIH degli Stati Uniti)
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .