There are about 3194 clinical studies being (or have been) conducted in Portugal. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
The main purposes of this randomized cross-over trial are to characterize and compare the effects of a moderate dose of caffeine intake in healthy physically active males on hydration and energy metabolism specifically: 1. Total body water and its compartments (intracellular and extracellular) assessed by by dilution techniques, and hydration state by urine specific gravity; 2. Total energy expenditure by double labeled water, resting energy expenditure by indirect calorimetry, and physical activity energy expenditure; 3. Energy expenditure in physical activity of daily living, in particular duration and intensity of activity. 4. If the changes occurred between placebo and caffeine ingestion on the main outcomes were dependent on specific covariates, namely body composition and dietary intake.
This study will evaluate the non-inferiority of Stribild® (elvitegravir/cobicistat/ emtricitabine/tenofovir disoproxil fumarate (E/C/F/TDF)) single-tablet regimen (STR) relative to regimens consisting of a protease inhibitor (PI) boosted with ritonavir (RTV) plus Truvada® (FTC/TDF) fixed-dose combination in maintaining HIV-1 RNA < 50 copies/mL at Week 48 in virologically suppressed, HIV-1 infected adults. This study will also evaluate the safety, tolerability, and efficacy of the two regimens through 96 weeks of treatment.
The DUAL-2 study is designed as a multicenter, double-blind two-period study with an initial fixed 16-week Period 1, followed by a Period 2 of variable duration. All patients completing Period 1 will continue on their original randomized treatment into Period 2, until the last randomized patient has completed Period 1. Patients will be randomized in a 1:1:1 ratio (macitentan 3mg: macitentan 10mg: placebo). The primary objective is to demonstrate the effect of macitentan on the reduction of the number of new digital ulcers in patients with systemic sclerosis and ongoing digital ulcers (DU). Other objectives include: - the evaluation of the efficacy of macitentan on hand functionality and DU burden at Week 16 in SSc patients with ongoing DU disease. - the evaluation of the safety and tolerability of macitentan in these patients. - the evaluation of the efficacy of macitentan on time to first DU complication during the entire treatment period.
The purpose of the ISCHEMIA trial is to determine the best management strategy for higher-risk patients with stable ischemic heart disease (SIHD). This is a multicenter randomized controlled trial with 5179 randomized participants with moderate or severe ischemia on stress testing. A blinded coronary computed tomography angiogram (CCTA) was performed in most participants with eGFR ≥60 mL/min/1.73m2 to identify and exclude participants with either significant unprotected left main disease (≥50% stenosis) or those without obstructive CAD (<50% stenosis in all major coronary arteries). Of 8518 participants enrolled, those that had insufficient ischemia, ineligible anatomy demonstrated on CCTA or another exclusion criterion, did not go on to randomization. Eligible participants were then assigned at random to a routine invasive strategy (INV) with cardiac catheterization followed by revascularization, if feasible, plus optimal medical therapy (OMT) or to a conservative strategy (CON) of OMT, with cardiac catheterization and revascularization reserved for those who fail OMT. SPECIFIC AIMS A. Primary Aim The primary aim of the ISCHEMIA trial is to determine whether an initial invasive strategy of cardiac catheterization followed by optimal revascularization, if feasible, in addition to OMT, will reduce the primary composite endpoint of cardiovascular death, nonfatal myocardial infarction, resuscitated cardiac arrest, or hospitalization for unstable angina or heart failure in participants with SIHD and moderate or severe ischemia over an average follow-up of approximately 3.5 years compared with an initial conservative strategy of OMT alone with catheterization reserved for failure of OMT. B. Secondary Aims Secondary aims are to determine whether an initial invasive strategy compared to a conservative strategy will improve: 1) the composite of CV death or MI; 2) angina symptoms and quality of life, as assessed by the Seattle Angina Questionnaire; 3) all-cause mortality; 4) net clinical benefit assessed by including stroke in the primary and secondary composite endpoints; and 5) individual components of the composite endpoints. Condition: Coronary Disease Procedure: Coronary CT Angiogram Procedure: Cardiac catheterization Phase: Phase III per NIH Condition: Cardiovascular Diseases Procedure: Angioplasty, Transluminal, Percutaneous Coronary, other catheter-based interventions Phase: Phase III per NIH Condition: Heart Diseases Procedure: Coronary Artery Bypass Surgery Phase: Phase III per NIH
Compare safety of Lacosamide (LCM) to Carbamazepine Controlled-Release (CBZ-CR) as monotherapy in newly or recently newly diagnosed subjects with primary safety variables including spontaneous reports of Adverse Events (AEs), withdrawal of subjects due to AEs, reporting of Serious AEs (SAEs).
This observational retrospective healthcare medical record review study is to evaluate and differentiate the clinical characteristics and outcomes in peritoneal dialysis (PD) patients with either endotoxin-associated sterile peritonitis (e-SP), bacterial peritonitis (BP) or no peritonitis (NoP) over a 12-15 month period from dialysis clinics in The Netherlands, Germany, Hungary, Portugal, and the United Kingdom (UK). The primary study objectives are to: - Describe changes in the peritoneal membrane function and clinical outcomes over time between e-SP, BP and NoP PD patients. - Describe and differentiate clinical characteristics during the acute clinical presentation of e-SP and BP. The secondary study objective is to: - Generate a dataset that will facilitate post hoc exploratory hypothesis-generation related to clinical and resource utilisation (RU) outcomes in association with e-SP.
The purpose of the study is to determine whether the addition of Ipilimumab to Etoposide and Platinum therapy will extend the lives of patients with Extensive-Stage Disease Small Cell Lung Cancer (ED-SCLC) more than Etoposide and Platinum therapy alone.
This randomized, open-label, multicenter, international phase IIIb study will compare the efficacy and safety of two Herceptin (trastuzumab) dosing regimens in combination with cisplatin/capecitabine chemotherapy in patients with metastatic gastric or gastro-esophageal junction adenocarcinoma. Patients who have not received prior treatment for metastatic disease will be randomized to receive Herceptin intravenously either an 8 mg/kg loading dose followed by 6 mg/kg every 3 weeks or an 8 mg/kg loading dose followed by 10 mg/kg every 3 weeks. Capecitabine will be administered for 6 cycles at a dose of 800 mg/m2 orally twice on Days 1-14 of each 3-week cycle, cisplatin will be administered intravenously for 6 cycles at a dose of 80 mg/m2 on Day 1 of each 3-week cycle. Anticipated time on study treatment is until disease progression occurs.
This prospective, multicenter, observational cohort study will evaluate the efficacy and safety of peginterferon alfa (e.g. Pegasys) plus ribavirin and treatment regimens containing direct-acting antivirals in patients with chronic hepatitis C who are treatment-naïve or treatment-experienced and HIV HCV co-infected. Data will be collected from patients receiving treatment according to current Summary of Product Characteristics and local labeling for the duration of their treatment and a 24-week follow-up.
To characterise phenotypes of Non Proliferative Diabetic Retinopathy (NPDR) progression using multimodal testing/imaging procedures.