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      Evaluación de los factores de riesgo que predisponen a la hipertensión arterial a través de un modelo de regresión logística Translated title: Assessment of risk factors that predispose to hypertension through a logistic regression model

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          Abstract

          La hipertensión arterial (HTA) representa uno de los factores de riesgo que más contribuye a la enfermedad cardiovascular y actualmente se desarrollan modelos de predicción de riesgo a padecerla. El objetivo de esta investigación fue evaluar la reproducibilidad de un modelo de regresión logística en una población del estado Carabobo, Venezuela, así como la introducción de nuevas variables que mejoren dicho modelo. A 202 pacientes se les evaluó distintos factores de riesgo de HTA con los cuales se evaluó la reproducibilidad de un modelo ya planteado. Posteriormente se evaluó la introducción de nuevas variables al modelo que pudieran mejorar el mismo, utilizando el método del paso a paso de regresión logística. El modelo de predicción de riesgo que sirve como base a este estudio incorpora 3 variables: Presión arterial sistólica (PAS), edad e índice de masa corporal (IMC), de los cuales en este trabajo sólo edad e IMC resultaron significativas (p <0,000 y p <0,012 respectivamente). Una segunda regresión logística adicional, evaluó la introducción de nuevas variables al estudio, donde solo el fenotipo de cintura hipertrigliceridemia (CHT) contribuye a mejorar el modelo predictivo de la HTA. Por tanto, se encontró reproducibilidad parcial del modelo de predicción de riesgo de HTA, además de mejorar el mismo, al añadir la variable fenotipo de CHT. Se recomienda realizar nuevas investigaciones en otras poblaciones venezolanas así como estudios que involucren otras covariables clínicas.

          Translated abstract

          High blood pressure (hypertension) is one of the risk factors that contribute most to cardiovascular disease. Adequate risk prediction models are needed to address prevention. The objective of this research was to evaluate the reproducibility of a logistic regression model in a population of Carabobo, Venezuela, and the introduction of new variables to improve the model. A total of 202 patients were assessed various risk factors of hypertension with which the reproducibility of an already proposed model was evaluated. Later, the introduction of new variables to the model that could improve it by using the stepwise logistic regression method was evaluated. The model risk prediction that serves as the basis of this study incorporates three variables: systolic blood pressure (SBP), age and body mass index (BMI), from which, in this work, only age and BMI were significant (p-value <0.000 and p <0.012 respectively). A second additional logistic regression assessed the introduction of new variables to the study, where only hypertriglyceridemic waist (HTW) phenotype helps to improve the predictive model of hypertension. Therefore, partial reproducibility of risk prediction model of hypertension was found, in addition to improving it by adding the variable HTW phenotype. We recommend further research in other Venezuelan populations and studies involving other clinical covariates.

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          Most cited references35

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          An Introduction to Categorical Data Analysis

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            Prevalence of β-hemolytic groups C and F streptococci in patients with acute pharyngitis

            Background: The roles of group C and F streptococci in causing endemic pharyngitis are still controversial, although group C streptococci are implicated in the outbreaks of pharyngitis and associated disorders. Aim: The aim of this study was to determine the prevalence and the role of these groups of β-hemolytic streptococci in acute pharyngitis with emphasis on the Streptococcus anginosus group. The antimicrobial susceptibility profile of these bacterial isolates and their ability to produce some virulence factors was also determined. Materials and Methods: Throat swab specimens were collected from 177 patients suffering from acute pharyngitis who had been admitted to the Hilla Teaching Hospital, Hilla, Iraq, during October 2009 to January 2010. The necessary biochemical tests were conducted and the organisms identified using standard procedures. Susceptibility of isolates pathogens to several antibiotics was examined using standard susceptibility testing. Virulence factors of these isolates were also determined using standard methods. Results: Results revealed that a total of 67 isolates belonged to β-hemolytic streptococci, of which 11(16.4%) isolates belonged to anginosus group streptococci, which possessed Lancefield group C and F antigens. Most of these bacterial isolates have the ability to produce more than one virulence factor such as capsule, hemolysin, CFA III, and lipase enzyme. The bacterial isolates were highly resistant to ampicillin, cefotaxime, and cefepime while they exhibited moderate resistance to tetracycline, ceftriaxone, and ciprofloxacin. On the other hand, they showed a high sensitivity to vancomycin, ofloxacin, and clindamycin. Conclusion: This study concluded that groups C and F Streptococci were implicated as a cause of acute pharyngitis in 6.2% of the specimens among other groups of streptococci. Most of these isolates have the ability to produce more than one virulence factor. There was a high rate of resistance among isolates for β-lactam antibiotics; however, they were highly susceptible to vancomycin, ofloxacin, and clindamycin.
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              Introducción a la metodología de la investigación

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                s
                Salus
                Salus
                Universidad de Carabobo
                1316-7138
                August 2016
                : 20
                : 2
                : 18-23
                Affiliations
                [1 ] Universidad de Carabobo
                [2 ] Universidad Nacional de Educación a Distancia España
                Article
                S1316-71382016000200005
                42579ec4-9e05-4723-87e9-f5e95ac30495

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Venezuela

                Self URI (journal page): http://www.scielo.org.ve/scielo.php?script=sci_serial&pid=1316-7138&lng=en
                Categories
                HEALTH CARE SCIENCES & SERVICES
                HEALTH POLICY & SERVICES

                Health & Social care,Public health
                Hipertensión arterial,regresión logística,modelo de predicción de riesgo,Hypertension,logistic regression,risk prediction model

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