Mi chico no quiere usar condón. Estrategias innovadoras para la prevención de la transmisión sexual del VIH/sida

Llevamos bastantes años investigando las conductas sexuales de los jóvenes, y sabemos ya qué hacen, cómo lo hacen y cuántos y cuántas lo hacen. Llevamos también algunos años investigando las razones por las que llevan a cabo prácticas sexuales de riesgo respecto a la transmisión del VIH/sida, y sabemos ya por qué hacen lo que…

Metodología de investigación y escritura científica en clínica

La aparición de la Edición 1998 de «Metodología de investigación y escritura científica en clínica» plantea dos preguntas importantes: Pregunta nº 1: «¿Qué material nuevo trae esta edición?» En primer lugar, la sección IV.B.5. «Las etapas del proceso de investigación en salud» se ha reescrito totalmente reagrupando los 18 pasos que componen las etapas conceptual…

Methylenetetrahydrofolate Reductase (MTHFR) Gene Polymorphism and Infant’s Anthropometry at Birth

Identification of causal factors that influence fetal growth and anthropometry at birth is of great importance as they provide information about increased risk of disease throughout life. The association between maternal genetic polymorphism MTHFR(677)C>T and anthropometry at birth has been widely studied because of its key role in the one-carbon cycle. MTHFR(677) CT and TT…

Methodological issues in a prospective study on plasma concentrations of persistent organic pollutants and pancreatic cancer risk within the EPIC cohort

Background The use of biomarkers of environmental exposure to explore new risk factors for pancreatic cancer presents clinical, logistic, and methodological challenges that are also relevant in research on other complex diseases. Objectives First, to summarize the main design features of a prospective case-control study –nested within the European Prospective Investigation into Cancer and Nutrition…

Methodological issues in a prospective study on plasma concentrations of persistent organic pollutants and pancreatic cancer risk within the EPIC cohort

Background The use of biomarkers of environmental exposure to explore new risk factors for pancreatic cancer presents clinical, logistic, and methodological challenges that are also relevant in research on other complex diseases. Objectives First, to summarize the main design features of a prospective case-control study –nested within the European Prospective Investigation into Cancer and Nutrition…

Metabolomic profiles of hepatocellular carcinoma in a European prospective cohort

Background Hepatocellular carcinoma (HCC), the most prevalent form of liver cancer, is difficult to diagnose and has limited treatment options with a low survival rate. Aside from a few key risk factors, such as hepatitis, high alcohol consumption, smoking, obesity, and diabetes, there is incomplete etiologic understanding of the disease and little progress in identification…

Metabolic Signatures of Healthy Lifestyle Patterns and Colorectal Cancer Risk in a European Cohort

Colorectal cancer risk can be lowered by adherence to the World Cancer Research Fund/American Institute for Cancer Research (WCRF/AICR) guidelines. We derived metabolic signatures of adherence to these guidelines and tested their associations with colorectal cancer risk in the European Prospective Investigation into Cancer cohort. Methods Scores reflecting adherence to the WCRF/AICR recommendations (scale, 1–5)…

Metabolic perturbations prior to hepatocellular carcinoma diagnosis: Findings from a prospective observational cohort study

Hepatocellular carcinoma (HCC) development entails changes in liver metabolism. Current knowledge on metabolic perturbations in HCC is derived mostly from case‐control designs, with sparse information from prospective cohorts. Our objective was to apply comprehensive metabolite profiling to detect metabolites whose serum concentrations are associated with HCC development, using biological samples from within the prospective European…

Menstrual factors, reproductive history, hormone use, and Urothelial carcinoma risk: A prospective study in the EPIC cohort

Background: Urothelial carcinoma (UC) is the predominant (95%) bladder cancer subtype in industrialised nations. Animal and epidemiological human studies suggest that hormonal factors may influence UC risk. Methods: We used an analytic cohort of 333 919 women from the European Prospective Investigation into Cancer and Nutrition Cohort (EPIC). Associations between hormonal factors and incident UC…