Search results for "trials"
showing 10 items of 966 documents
'Tell Us Only What You Know': Evidentiality in the Discourse of Participants in Spanish Trials
2019
El objetivo de esta propuesta es explorar el uso de la evidencialidad en los juicios españoles y su relación con las convenciones del género y los roles de los participantes en estos eventos discursivos. Para ello, basamos nuestro estudio en un análisis cuantitativo-cualitativo de un corpus transcrito de ensayos orales en español. La evidencialidad es una categoría semántico-funcional que incluye dispositivos lingüísticos que marcan la fuente de información detrás de las declaraciones del hablante. El marcado explícito de la fuente no es obligatorio en español; sin embargo, en géneros específicos (legal, parlamentario y académico), se convierte en una poderosa herramienta argumentativa para…
Atenuación en el discurso de los participantes no profesionales de los juicios orales. ¿Un caso de lenguaje débil?
2020
El objetivo de este artículo es estudiar la manera en que se manifiesta la atenuación en los participantes no profesionales de los juicios orales. Tradicionalmente, se ha vinculado el empleo de recursos relacionados con la atenuación (como los hedges o las fórmulas de cortesía) con el lenguaje débil, pues las personas que usan estos recursos en su declaración limitan su compromiso con lo dicho y son percibidas como menos creíbles y menos inteligentes (Erickson, Lind, Johnson & O'Barr, 1978). No obstante, tras analizar un corpus de 12 juicios orales españoles pertenecientes al juzgado de lo penal, se ha comprobado que el uso de estos y otros recursos que se asocian con la atenuación pueden p…
Emergency sclerotherapy versus vasoactive drugs for variceal bleeding in cirrhosis
2003
Abstract Background & aims: Emergency sclerotherapy is used as a first-line therapy for variceal bleeding in cirrhosis, although pharmacologic treatment stops bleeding in most patients. We performed a meta-analysis comparing emergency sclerotherapy with pharmacologic treatment. Methods: MEDLINE (1968–2002), EMBASE (1986–2002), and the Cochrane Library (2002;4) were searched to retrieve randomized controlled trials comparing sclerotherapy with vasopressin (± nitroglycerin), terlipressin, somatostatin, or octreotide for variceal bleeding in cirrhosis. Outcome measures were failure to control bleeding, rebleeding, blood transfusions, adverse events, and mortality. Results: Fifteen trials were …
Prevention of Hepatocellular Carcinoma
2005
The accuracy and the reliability of well-recognized clinical, virologic, histologic, and molecular risk factors for HCC are still insufficient; thus, accurate risk prediction of developing cancer in individual patients remains an elusive goal. Future directions in chemprevention of HCC will be on the development of molecular risk models and of new chemopreventive agents. The design of targeted molecular therapies may need to be tailored to the specific molecular phenotype of a specific HCC. Studies examining multiple genes and proteins (genomics and proteomics) in the same HCCs will be required to evaluate this possibility thoroughly. In the setting of primary prevention, the epidemiologic …
Should cirrhosis change our attitude towards treating non-hepatic cancer?
2011
Cirrhosis is a major cause of morbidity and mortality and is the end stage of any chronic liver disease. Cancer, a leading cause of death worldwide, is a growing global health issue. There are limited data in the literature on the incidence, prevalence and management of non-hepatic cancers (NHC) in cirrhotic patients. The aim of this brief review was to underline the main concerns, pitfalls and warnings regarding practice for these patients. Survival of patients with compensated cirrhosis is significantly longer than that of decompensated cirrhosis and patients with NHC and in Child-Pugh class C should not be candidates for cytotoxic chemotherapy. It is important before starting cytotoxic c…
Effect of pharmacological interventions and placebo on liver Histology in nonalcoholic steatohepatitis: A network meta-analysis
2022
Background: The aims of this study were to quantify the histological improvement and its risk factors in patients with NASH enrolled in the placebo arms of randomized controlled trials (RCTs), and to indirectly compare the effect of several investigational drugs for NASH on validated histological outcomes.Data synthesis: A comprehensive search was conducted to detect phase 2 and 3 RCTs comparing pharmacological interventions in patients with NASH. According to Food and Drug Administra-tion (FDA) recommendations, primary outcomes included: 1) NASH resolution without wors-ening of fibrosis; 2) At least 1-point reduction in fibrosis without worsening of NASH. Meta -analysis and meta-regression…
Treatment of hepatitis C: critical appraisal of the evidence
2005
Chronic hepatitis C virus infection is currently the most common cause of end stage liver disease worldwide. Although the conclusions of the last National Institutes of Health Consensus Development Conferences on Hepatitis C have recently been published, several important issues remain unanswered. This paper reviews the available data using an evidence-based approach. Current evidence is sufficient to recommend IFN treatment for all patients with acute hepatitis. A later initiation of therapy yields the same likelihood of response as early treatment. A daily induction dose during month 1 is the best treatment option. The current gold standard of efficacy for treatment-naive patients with ch…
Interferon and prevention of hepatocellular carcinoma in viral cirrhosis: an evidence-based approach.
2001
Abstract Background/Aims : To evaluate by meta-analysis of available literature whether interferon (IFN) reduces the incidence of hepatocellular carcinoma (HCC) in patients with hepatitis B virus (HBV) or hepatitis C virus (HCV)-related Child A cirrhosis. Methods : Three randomized controlled trials and 15 nonrandomized controlled trials, including 4614 patients and comparing IFN to no treatment, were selected. Data on the incidence of HCC in IFN treated and untreated patients were extracted from each study. Meta-analysis by the DerSimonian and Laird risk difference (RD) method was used to pool observations. Results : A different incidence of HCC between treated and untreated cirrhotic pati…
Radiofrequency thermal ablation vs. percutaneous ethanol injection for small hepatocellular carcinoma in cirrhosis: meta-analysis of randomized contr…
2009
Radiofrequency thermal ablation (RF) and percutaneous ethanol injection (PEI) have been employed in the treatment of small hepatocellular carcinoma (HCC) as curative treatments. The aim of the study was to review the available evidence comparing RF to PEI for small HCC.Cochrane, MEDLINE, CANCERLIT, and ENBASE databases were used.randomized clinical trials evaluating RF vs. PEI. Data were extracted from each randomized controlled trial (RCT). Primary outcomes were overall survival and local recurrence. Meta-analysis software was used and risk differences (RDs) and their 95% confidence intervals and Q-test for heterogeneity were calculated.Five RCTs were identified including 701 patients. The…