La teoría de la credibilidad provee un conjunto de métodos que permiten a una compañía de seguros ajustar las primas futuras, sobre la base de la experiencia pasada individual e información de toda la cartera. En este trabajo presentaremos los principales modelos de credibilidad utilizados en la práctica, como lo son los modelos de Bühlmann (1967), Bühlmann-Straub (1970), Jewell (1975) y Hachemeister (1975), todos ellos analizados en sus propiedades desde un punto de vista geométrico a través de la teoría de espacios de Hilbert y en su estimación mediante el uso de los modelos lineales mixtos. Mediante un estudio de simulación se mostrará la ventaja de utilizar este último enfoque de estimación.

La teoría de la credibilidad provee un conjunto de métodos que permiten a una compañía de seguros ajustar las primas futuras, sobre la base de la experiencia pasada individual e información de toda la cartera. En este trabajo presentaremos los principales modelos de credibilidad utilizados en la práctica, como lo son los modelos de Bühlmann (1967), Bühlmann-Straub (1970), Jewell (1975) y Hachemeister (1975), todos ellos analizados en sus propiedades desde un punto de vista geométrico a través de la teoría de espacios de Hilbert y en su estimación mediante el uso de los modelos lineales mixtos. Mediante un estudio de simulación se mostrará la ventaja de utilizar este último enfoque de estimación.

Introduction: The evaluation of the total spine by magnetic resonance imaging in a T2-weighted single sequence using Software Composing previous planning, called panoramic, would be beneficial in the study of lumbosacral spine for the additional information that could be obtained. Objective: To analyze the application of T2 panoramic sequence for magnetic resonance imaging of the lumbosacral segment. Methods: Retrospective and cross-sectional study executed with 186 cases selected by stratified probability sampling, between 18 and 60 years old, using a form consisted of a general sheet and an analytical sheet obtained from the request for radiological study and the examination itself. Results: Of the total, 80.1% were in the adult stage of life, and 53.8% were female, and 52.7% had the suspicion of herniated disc as a specific diagnostic presumption. Degenerative pathologies were mainly ...

Introduction: The evaluation of the total spine by magnetic resonance imaging in a T2-weighted single sequence using Software Composing previous planning, called panoramic, would be beneficial in the study of lumbosacral spine for the additional information that could be obtained. Objective: To analyze the application of T2 panoramic sequence for magnetic resonance imaging of the lumbosacral segment. Methods: Retrospective and cross-sectional study executed with 186 cases selected by stratified probability sampling, between 18 and 60 years old, using a form consisted of a general sheet and an analytical sheet obtained from the request for radiological study and the examination itself. Results: Of the total, 80.1% were in the adult stage of life, and 53.8% were female, and 52.7% had the suspicion of herniated disc as a specific diagnostic presumption. Degenerative pathologies were mainly ...

Objectives: Identify the factors associated with the presence of bullying in secondary school students of a state  school in the district of El Porvenir, Peru. Material  and  methods: This  descriptive, cross-sectional study with an observational  design  was carried out using a self-applicable  survey.  The  population  was composed of 1,069 students from the 1st to the 5th year of secondary school. The sample was probabilistic and  stratified, designed to be  representative and give reliable estimates about the problem and included 318 male and female students enrolled during 2013. The instrument used was the questionnaire developed and validated by the Technical Team of the National Commission for Development and Life without Drugs – DEVIDA, based on a standardizeddevice proposed by SIDUC/CICAD. In the first stage, a b...

Objetivo: Determinar las causas de insatisfacción e indiferencia en las dimensiones de calidad de atención de un Hospital Acreditado en Perú. Materiales y métodos: Se realizó un estudio no experimental, observacional, descriptivo, correlacional de corte transversal de enfoque mixto. La población estuvo conformada por los usuarios en el año 2023, con una muestra de 150 usuarios. se procesó la información mediante paquetes estadísticos (1), a través de la encuesta SERPERF  y para la identificación de causas se utilizó la Espina de Ishikawa. Resultados: Se evidencio un 72.7% de los usuarios evidenciaron indiferencia con el nivel de satisfacción con la atención, el 19.3% usuarios evidenciaron estar satisfechos y el 8 % usuarios evidencio estar moderadamente insatisfechos.

Objetivo: Este estudio tiene como objetivo determinar cómo se asocian los riesgos biológicos y ergonómicos con los accidentes laborales en el personal de salud del Centro de Salud Totora Oropesa del departamento de Apurímac durante el año 2023. Materiales y Métodos: Estudio cuantitativo, descriptivo y de corte transversal. Se aplicó un cuestionario compuesto por 8 preguntas cerradas para recolectar información sobre características sociodemográficas, laborales y la ocurrencia de accidentes laborales. Los datos fueron analizados utilizando frecuencias, porcentajes y pruebas estadísticas para establecer la relación entre las variables estudiadas. Resultados: De los 120 trabajadores, los factores de riesgo que más se presentan son los biológicos, en 106 (88,3%), seguidos de los factores ergonómicos en 102 (85,0 %) trabajadores. Se observó que 63 (52,0%) presentaron un riesgo...

Objective: To establish the relationship between quality of service and satisfaction among patients who underwent minimally invasive facial cosmetic treatments in a private clinic, Lima-Peru, 2019. Materials and methods: An observational, descriptive and cross-sectional study with a quantitative and correlational approach. One hundred twenty-three (123) patients were surveyed by means of the service performance (SERVPERF) model and the outpatient service user satisfaction (SUCE) questionnaire, which were adapted to the study population. The IBM SPSS Statistics version 20 and the Spearman’s rank correlation test were used.  Results: Twenty-three percent (23 %) of the patients reported a high quality of service; 58 %, a medium quality of service; and 19 %, a low quality of service. Additionally, a medium-level quality prevailed in the following quality of service dimensions: reliabilit...

Objective: To evaluate the relationship between quality of care and degree of satisfaction of patients treated at a dental chain in Lima, Peru, from 2019 to 2020. Materials and methods: A quantitative, descriptive and cross-sectional study. Two surveys were administered: the SERVPERF model (consisting of five dimensions) and the satisfaction survey created by Ramírez (consisting of three dimensions). Both surveys were administered to patients treated during the 2019–2020 period. Results: Out of the 150 respondents, 93.30 % perceived a high quality of care (Partially agree and Totally agree) and 3.30 % disagreed with the quality of care (Totally disagree and Partially disagree). Therefore, the latter were included in the low-quality-of-care group. It was also found that 96.70 % (145) of the surveyed patients were satisfied with their care in the dental chain, 3.30 % (5) were dissatisfi...

Objetivo: Analizar el engagement y rendimiento académico en estudiantes universitarios del curso Gestión en Salud durante el año 2023. Material y métodos: Investigación de diseño no experimental tipo correlacional, la población de estudio estuvo conformada por estudiantes de la Escuela Profesional de Obstetricia matriculados en el curso Gestión en Salud. El tipo de muestreo utilizado fue no probabilístico intencional. La recolección de datos se realizó mediante el cuestionario denominado “Student Engagement Questionnaire”, contiene 35 preguntas distribuidas en cinco dimensiones, con respuestas mediante una escala de Likert; tiene un coeficiente de fiabilidad entre 0,70 y 0,93. El rendimiento académico fue medido mediante el promedio final de notas según escala vigesimal. El procesamiento de datos se realizó mediante SPSS versión 22 y la prueba de Rho de Spearman.&...

Introduction. Collaborative work promotes learning through active participation of students, allowing the development of social abilities and the construction of their own knowledge. Objective. To analyze collaborative work and its relationship with academic performance in medical students in a research course. Methods. Cross-sectional study, in which 148 human medicine students enrolled in the research course participated, selected using a non-probabilistic sample. The questionnaire called analysis of cooperative work in higher education that assesses the importance of collaborative work, of 49 questions distributed in seven dimensions, was used. A Likert scale was used in a range of 1 to 5, where 1 is valued as a total disagreement and 5 totally agree. Three groups were established: low group to 33 percentile; middle group, from 34th percentile to 66t...

Objective. The main goal of this study was to determinate the relationship between the use of Remind app as a support tool and the academic performance in teaching a research course to medical students in 2020. Methods. Correlational and cross-sectional research with medical students from a private university from the basic research course. This was applied to a non-probabilistic sample made of 96 participants. A 3 dimensioned and 24 questions questionnaire was used in the Likert scale, and contains (0.94) reability. Descriptive statistics and bivariate analysis were used. Results. The average age was 23.2 ± 5.9 years old, 68.8% were female. 96.9% used the app for the first time and 72.9% considered Remind as a safe app. Academic dimension: 85% agreed with the app as it allows to send reminders of the upcoming classes. Learning dimension: 79% learned to manage their time in a better way...

Objective. To analyze the level of knowledge and perception of palliative care among anesthesiology residents in three public hospitals in Lima. Methods. An observational study was conducted, evaluating anesthesiology residents through a questionnaire (Paliative Care Knowlege Test, Spanish version) and five opinion questions applied between June and July 2021. The questionnaire, validated by experts, investigated aspects such as training received in palliative care, previous training, inclination to work in multidisciplinary teams and interest in future specialization in palliative care. Results. Forty resident physicians participated. Sixty-five percent were female and 95% were in the age range of 24 to 40 years. Sixty percent had a medium level of knowledge and 40% high. All of them emphasized the importance of the anesthesiologist's role in palliative care, 50% expressed feeling insuf...

El problema materia de investigación se ha identificado en la rentabilidad de las medianas empresas comerciales de Lima Metropolitana, Dichas empresas por la situación pandémica han reducido sus ventas y han mantenido altos costos fijos lo que se concreta en una reducida utilidad en algunos casos y en otros en pérdida. Dicha situación se expresa en la siguiente pregunta general: ¿Cómo podrá influir el marketing en la rentabilidad de las medianas empresas comerciales de Lima Metropolitana?; frente a lo cual se estableció y logró el siguiente objetivo general: Determinar la influencia del marketing en la rentabilidad de las medianas empresas comerciales de Lima Metropolitana. Asimismo, se consideró la hipótesis general: El marketing influye en grado estadísticamente alto en la rentabilidad de las medianas empresas comerciales de Lima Metropolitana. Finalmente se ha logrado que...

Introduction. The educational model focused on learning attempts to provide the student a more important role in the process of acquiring knowledge, for this it is necessary to identify preferences or learning style of the students. Objectives. Analysis the influence of the use of active methodology and learning styles in students of the methodology course of undergraduate research. Methods. Quantitative study of quasi-experimental, prospective longitudinal design, the study population consisted of undergraduate students of the research methodology course. A non-probabilistic sample was used for convenience, consisting of 79 students. The instrument used was the learning style test developed by David Kolb. The implementation of the active methodology was carried out during the development of the course. Results The participation of the students during the development of classes and the u...

Objective: Analyze management skills from employees’ perception in the Los Olivos Municipal Hospital in 2019. Methods: Quantitative, correlational, cross-sectional study. A simple random sample of 52 participants was applied. We used a questionnaire to assess perceptions regarding management skills, consisting of 27 questions and 4 dimensions, with a Cronbach’s alpha reliability value of 0.97. We used Pearson’s chi-squared test to analyze correlation between management skills variable and sociodemographic variables. Results: Management skills were considered adequate in analytic and interpersonal dimensions by 69% of participants, while emotional and motivational skills and values were considered regular by 69% and 58%, respectively. 55.8% of participants perceived their bosses’ management skills as adequate, 44.2% perceived them as regular, and none as inadequate. The ...

Objective: Analyze management skills from employees’ perception in the Los Olivos Municipal Hospital in 2019. Methods: Quantitative, correlational, cross-sectional study. A simple random sample of 52 participants was applied. We used a questionnaire to assess perceptions regarding management skills, consisting of 27 questions and 4 dimensions, with a Cronbach’s alpha reliability value of 0.97. We used Pearson’s chi-squared test to analyze correlation between management skills variable and sociodemographic variables. Results: Management skills were considered adequate in analytic and interpersonal dimensions by 69% of participants, while emotional and motivational skills and values were considered regular by 69% and 58%, respectively. 55.8% of participants perceived their bosses’ management skills as adequate, 44.2% perceived them as regular, and none as inadequate. The ...