ABSTRACT
Relative survival represents the preferred framework for the analysis of population cancer survival data. The aim is to model the survival probability associated with cancer in the absence of information about the cause of death. Recent data linkage developments have allowed for incorporating the place of residence into the population cancer databases; however, modeling this spatial information has received little attention in the relative survival setting. We propose a flexible parametric class of spatial excess hazard models (along with inference tools), named "Relative Survival Spatial General Hazard," that allows for the inclusion of fixed and spatial effects in both time-level and hazard-level components. We illustrate the performance of the proposed model using an extensive simulation study, and provide guidelines about the interplay of sample size, censoring, and model misspecification. We present a case study using real data from colon cancer patients in England. This case study illustrates how a spatial model can be used to identify geographical areas with low cancer survival, as well as how to summarize such a model through marginal survival quantities and spatial effects.
Subject(s)
Colonic Neoplasms , Humans , Proportional Hazards Models , Survival Analysis , Computer Simulation , Sample Size , Models, StatisticalABSTRACT
COVID-19 has spread worldwide with a high variability in cases and mortality between populations. This research aims to assess socioeconomic inequities of COVID-19 in the city of Cali, Colombia, during the first and second peaks of the pandemic in this city. An ecological study by neighborhoods was carried out, were COVID-19 cases were analyzed using a Bayesian hierarchical spatial model that includes potential risk factors such as the index of unsatisfied basic needs and socioeconomic variables as well as random effects to account for residual variation. Maps showing the geographic patterns of the estimated relative risks as well as exceedance probabilities were created. The results indicate that in the first wave, the neighborhoods with the greatest unsatisfied basic needs and low socioeconomic strata, were more likely to report positive cases for COVID-19. For the second wave, the disease begins to spread through different neighborhoods of the city and middle socioeconomic strata presents the highest risk followed by the lower strata. These findings indicate the importance of measuring social determinants in the study of the distribution of cases due to COVID-19 for its inclusion in the interventions and measures implemented to contain contagions and reduce impacts on the most vulnerable populations.
Subject(s)
COVID-19 , Humans , COVID-19/epidemiology , Bayes Theorem , Colombia/epidemiology , Socioeconomic Factors , Cities/epidemiologyABSTRACT
BACKGROUND: Respiratory distress syndrome (RDS) is Mexico's second leading cause of neonatal mortality. The 75% reduction in mortality due to RDS has been attributed to the use of nasal continuous positive airway pressure (nCPAP). A survey was conducted to determine the perception of the medical staff regarding the availability of nCPAP equipment and supplies in Mexican hospitals with neonatal intensive care units (NICUs). METHODS: We sent a survey via e-mail to several neonatologists in each state of the country, requesting only one response per hospital. We performed statistical analysis with SPSS software. RESULTS: We received 195 surveys from private (HPri) and public (HPub) hospitals with NICUs nationwide: 100% of HPri and 39% of HPub. More than 75% of the nursing and medical staff had received formal training in nCPAP in 11% of HPri and 5% of HPub. The perceived availability of CPAP equipment was 83.7% vs. 52.1%; nasal cannula supply, 75.5% vs. 36.3%; air/oxygen blender availability, 51.0% vs. 32.9%, in HPri and HPub, respectively. The observed differences were statistically significant. Significant differences were also found among healthcare institutions. CONCLUSIONS: The availability of CPAP equipment and consumables between HPub and HPri is unbalanced and is lower in public institutions. Bubble CPAP is not included essential equipment in the national catalog of instruments and equipment for public hospitals, and its request is complicated. The training of CPAP staff and the availability of bubble CPAP and supplies in public hospitals should be improved.
INTRODUCCIÓN: El síndrome de dificultad respiratoria (SDR) es la segunda causa de mortalidad neonatal en México. La reducción del 75% de la mortalidad por SDR se le ha atribuido al uso de la presión positiva nasal continua de las vías respiratorias (nCPAP). Se realizó una encuesta con el objetivo de conocer la percepción del personal médico acerca de la disponibilidad del equipo e insumos para nCPAP en hospitales de México que cuenten con unidades de cuidados intensivos neonatales (UCIN). MÉTODOS: La encuesta se envió por correo electrónico a varios neonatólogos de cada estado del país y se solicitó una sola respuesta por cada hospital. El análisis estadístico se realizó con el software SPSS. RESULTADOS: Se recibieron 195 encuestas respondidas tanto de hospitales privados (HPri) como públicos (HPub) que cuentan con UCIN a escala nacional: el 100% de HPri y el 39% de HPub. Más del 75% del personal de enfermería y médico recibió una capacitación formal en nCPAP en el 11% de HPri y el 5% de HPub. La percepción de disponibilidad de equipos de presión positiva continua de las vías respiratorias (CPAP) fue del 83.7% vs. el 52.1%; el abasto de cánulas nasales, del 75.5% vs. el 36.3%; la disponibilidad del mezclador aire/oxígeno, del 51.0 % vs. el 32.9%, en HPri y HPub, respectivamente. Las diferencias fueron estadísticamente significativas. También se encontraron diferencias significativas entre las instituciones de salud. CONCLUSIONES: La disponibilidad de equipo y material de consumo para CPAP entre HPub y HPri es desequilibrada, y es menor en las instituciones públicas. El CPAP burbuja no se encuentra incluido en el cuadro básico de equipo médico y se dificulta su solicitud. Debe mejorarse la capacitación del personal en CPAP y la disponibilidad de CPAP burbuja e insumos en los hospitales públicos.
Subject(s)
Neonatology , Respiratory Distress Syndrome, Newborn , Continuous Positive Airway Pressure , Humans , Infant, Newborn , Intensive Care Units, Neonatal , PerceptionABSTRACT
Abstract Background: Respiratory distress syndrome (RDS) is Mexico's second leading cause of neonatal mortality. The 75% reduction in mortality due to RDS has been attributed to the use of nasal continuous positive airway pressure (nCPAP). A survey was conducted to determine the perception of the medical staff regarding the availability of nCPAP equipment and supplies in Mexican hospitals with neonatal intensive care units (NICUs). Methods: We sent a survey via e-mail to several neonatologists in each state of the country, requesting only one response per hospital. We performed statistical analysis with SPSS software. Results: We received 195 surveys from private (HPri) and public (HPub) hospitals with NICUs nationwide: 100% of HPri and 39% of HPub. More than 75% of the nursing and medical staff had received formal training in nCPAP in 11% of HPri and 5% of HPub. The perceived availability of CPAP equipment was 83.7% vs. 52.1%; nasal cannula supply, 75.5% vs. 36.3%; air/oxygen blender availability, 51.0% vs. 32.9%, in HPri and HPub, respectively. The observed differences were statistically significant. Significant differences were also found among healthcare institutions. Conclusions: The availability of CPAP equipment and consumables between HPub and HPri is unbalanced and is lower in public institutions. Bubble CPAP is not included essential equipment in the national catalog of instruments and equipment for public hospitals, and its request is complicated. The training of CPAP staff and the availability of bubble CPAP and supplies in public hospitals should be improved.
Resumen Introducción: El síndrome de dificultad respiratoria (SDR) es la segunda causa de mortalidad neonatal en México. La reducción del 75% de la mortalidad por SDR se le ha atribuido al uso de la presión positiva nasal continua de las vías respiratorias (nCPAP). Se realizó una encuesta con el objetivo de conocer la percepción del personal médico acerca de la disponibilidad del equipo e insumos para nCPAP en hospitales de México que cuenten con unidades de cuidados intensivos neonatales (UCIN). Métodos: La encuesta se envió por correo electrónico a varios neonatólogos de cada estado del país y se solicitó una sola respuesta por cada hospital. El análisis estadístico se realizó con el software SPSS. Resultados: Se recibieron 195 encuestas respondidas tanto de hospitales privados (HPri) como públicos (HPub) que cuentan con UCIN a escala nacional: el 100% de HPri y el 39% de HPub. Más del 75% del personal de enfermería y médico recibió una capacitación formal en nCPAP en el 11% de HPri y el 5% de HPub. La percepción de disponibilidad de equipos de presión positiva continua de las vías respiratorias (CPAP) fue del 83.7% vs. el 52.1%; el abasto de cánulas nasales, del 75.5% vs. el 36.3%; la disponibilidad del mezclador aire/oxígeno, del 51.0 % vs. el 32.9%, en HPri y HPub, respectivamente. Las diferencias fueron estadísticamente significativas. También se encontraron diferencias significativas entre las instituciones de salud. Conclusiones: La disponibilidad de equipo y material de consumo para CPAP entre HPub y HPri es desequilibrada, y es menor en las instituciones públicas. El CPAP burbuja no se encuentra incluido en el cuadro básico de equipo médico y se dificulta su solicitud. Debe mejorarse la capacitación del personal en CPAP y la disponibilidad de CPAP burbuja e insumos en los hospitales públicos.
ABSTRACT
BACKGROUND: There are several approaches widely used in the localization of the responsible artery in inferior myocardial infarction. However, the existing papers show differences in the point where the ST segment is measured. The purpose of our investigation is to analyse the influence of the point at which elevation of the ST segment is measured on the results of these algorithms. METHODS: We analysed the 12lead electrocardiograms of 90 consecutive patients with inferior myocardial infarction. The ST segment elevation or depression was measured at the J-point and at 80â¯ms, and three algorithms were applied to predict the culprit artery with both measurements. Sensitivity, specificity, the area under the curve, and the kappa index of agreement were analysed to compare each algorithm at the J-point and at 80â¯ms. RESULTS: The area under the curve was better at the J-point than at 80â¯ms in two algorithms (0.696 vs. 0.635, pâ¯<â¯0.043, and 0.754 vs. 0.661, pâ¯<â¯0.045) and did not change in one. Agreement between the J-point and 80â¯ms was suboptimal in all three algorithms (0.71, 0.65, and 0.58). CONCLUSIONS: The result of different algorithms to detect the culprit artery in inferior STEMI patients can change significantly depending on the point where ST elevation or depression is measured.
Subject(s)
Coronary Vessels/physiopathology , Electrocardiography , Inferior Wall Myocardial Infarction/physiopathology , Aged , Algorithms , Coronary Angiography , Female , Humans , Male , Middle Aged , Sensitivity and SpecificityABSTRACT
INTRODUCTION AND OBJECTIVES: Before including troponin I detection in the daily practice of our hospital we performed a prospective study to determine its real usefulness and to establish the best cut-off point. METHODS: We studied 82 consecutive patients admitted with unstable angina to a community hospital. Troponin I was determined (> 10 h after chest pain). Patients were referred to a tertiary hospital for catheterization/revascularization if clinical events developed. RESULTS: Twenty-five patients (31%) suffered events during admission: recurrent angina in 23 cases (28%); heart failure in 5 (6%); exitus in 3 (4%); myocardial infarction in 1 (1%). The cut-off point for troponin I that best predicted events was 0.1 ng/ml. Patients with troponin I > 0.1 (34 patients, 42%) experienced more events [47 vs. 19%; OR = 3.8 (1.4-10.4); p = 0.01] and had higher rates of recurrent angina (42 vs. 19%), heart failure (12 vs. 2%) and exitus (9 vs 0%). Patients with ECG changes and troponin I > 0.1 showed a significantly higher percentage of events (63%) than those with ECG changes alone (23%) or troponin I > 0.1 alone (15%) or those without ECG changes and troponin I < 0.1 (17%) (p < 0.0001). CONCLUSIONS: Troponin I elevation is useful for predicting in-hospital risk for unstable angina patients admitted to a community hospital. A low cut-off value (0.1 ng/ml) predicts events. The association of ECG changes and high troponin I identifies a population at very high risk; however, the absence of both variables in patients with a diagnosis of unstable angina does not preclude the development of events.
Subject(s)
Angina, Unstable/blood , Angina, Unstable/diagnosis , Troponin I/blood , Aged , Female , Hospitals, Community , Humans , Male , Multivariate Analysis , Prospective Studies , Risk Assessment , SpainABSTRACT
Introducción. Se tienen reportados en la literatura médica nacional 3 casos de rabia humana con recuperación parcial, todos ellos ocurridos en niños y transmitidos por perros. Caso clínico. Se presenta 1 caso de rabia con recuperación parcial en una niña de 5 años de edad que fue mordida por un murciélago en el dedo índice derecho, sin haber recibido un manejo apropiado de la herida ni el tratamiento profiláctico postexposición correspondiente. La paciente falleció por desnutrición grave y neumonía aguda casi 6 meses después de haber iniciado su cuadro clínico de encefalitis rábica. Conclusión. Si bien el diagnóstico de rabia incluyó aspectos epidemiológicos, clínicos y estudios específicos de laboratorio, ha de destacarse el hecho de que solamente las titulaciones de anticuerpos antirrábicos fueron positivos. Resulta preocupante que el caso que se reporta, al igual que el de una hermana, no haya recibido el tratamiento profiláctico correspondiente, lo que pone en evidencia las graves carencias socioeconómicas y culturales existentes en diversas regiones del país