Bernardo Valdivieso Martínez
Minuto Experto 128
Ovarian cancer risk factors by tumor aggressiveness: an analysis from the Ovarian Cancer Cohort Consortium
Ovarian cancer risk factors differ by histotype; however, within subtype there is substantial variability in outcomes. We hypothesized that risk factor profiles may influence tumor aggressiveness, defined by time between diagnosis and death, independent of histology. Among 1.3 million women from 21 prospective cohorts, 4,584 invasive epithelial ovarian cancers were identified and classified as highly…
La perspectiva de personas migrantes sobre el acceso a la atención sanitaria en el contexto de políticas de austeridad en Andalucía
Objetivo Conocer la valoración de personas migrantes sobre su acceso al sistema sanitario tras la entrada en vigor del Real Decreto-Ley16/2012 y sobre el efecto que han podido producir los recortes económicos en dicho acceso. Método Estudio cualitativo fenomenológico con entrevistas semiestructuradas, realizado en Andalucía, en dos fases (2009-2010 y 2012-2013), con 36 participantes. Se…
Educational Note: Paradoxical collider effect in the analysis of non-communicable disease epidemiological data: a reproducible illustration and web application
Classical epidemiology has focused on the control of confounding, but it is only recently that epidemiologists have started to focus on the bias produced by colliders. A collider for a certain pair of variables (e.g. an outcome Y and an exposure A) is a third variable (C) that is caused by both. In a directed…
Social support buffers the negative effects of stress in cardiac patients: a cross-sectional study with acute coronary syndrome patients
Cardiac patients who have social support generally have better prognosis than patients who lack social support. Several theoretical mechanisms have been proposed to explain this protective effect, including the capacity of social support to buffer the negative effects of stress. We tested this buffering effect in a study of patients hospitalized for acute coronary syndrome…
Interaction between MTHFR 677C>T, PON1 192Q>R and PON1 55L>M polymorphisms and its effect on non-recurrent spontaneous abortion in Mexican women
MTHFR is a key enzyme in folate metabolism. Some genetic polymorphisms code for a less efficient enzyme, increasing serum concentrations of homocysteine. This has been associated with inadequate feto-maternal circulation and increased risk of spontaneous abortion. Paroxonase 1 (PON1) is a multifunctional enzyme that can detoxify homocysteine through its homocysteine thiolactonase activity. We evaluate the…
Coffee and tea drinking in relation to the risk of differentiated thyroid carcinoma: results from the European Prospective Investigation into Cancer and Nutrition (EPIC) study
Purpose Coffee and tea constituents have shown several anti-carcinogenic activities in cellular and animal studies, including against thyroid cancer (TC). However, epidemiological evidence is still limited and inconsistent. Therefore, we aimed to investigate this association in a large prospective study. Methods The study was conducted in the EPIC (European Prospective Investigation into Cancer and Nutrition)…
KIM-1 as a Blood-Based Marker for Early Detection of Kidney Cancer: A Prospective Nested Case–Control Study
Purpose: Renal cell carcinoma (RCC) has the potential for cure with surgery when diagnosed at an early stage. Kidney injury molecule-1 (KIM-1) has been shown to be elevated in the plasma of RCC patients. We aimed to test whether plasma KIM-1 could represent a means of detecting RCC prior to clinical diagnosis. Experimental Design: KIM-1…
Implantación efectiva de la Cuádruple Hélice basada en el Modelo de Innovación en envejecimiento activo
Se presenta una experiencia práctica de implantación de la Cuádruple Hélice basada en el Modelo de Innovación de los Reference Sites de la Comisión Europea, a través del método Design Thinking. Este método establece que, para alcanzar con éxito el diseño de una solución digital, deben cubrirse cinco fases ineludibles: empatizar, definir, idear, prototipar y…
Risk prediction for estrogen receptor-specific breast cancers in two large prospective cohorts
Background Few published breast cancer (BC) risk prediction models consider the heterogeneity of predictor variables between estrogen-receptor positive (ER+) and negative (ER-) tumors. Using data from two large cohorts, we examined whether modeling this heterogeneity could improve prediction. Methods We built two models, for ER+ (ModelER+) and ER- tumors (ModelER-), respectively, in 281,330 women (51%…