Possible association between dysnatremias and mortality during hospitalization in patients undergoing acute hemodialysis: analysis from a Peruvian retrospective cohort / Possível associação entre distúrbios do sódio e mortalidade hospitalar em pacientes submetidos a hemodiálise aguda: análise de uma coorte retrospectiva peruana

Abstract Objective: To evaluate the association between dysnatremias or dyschloremias and mortality during hospitalization in patients with acute kidney injury (AKI) or chronic kidney disease (CKD) undergoing acute hemodialysis. Methods: We carried out a retrospective cohort study on adult patients undergoing acute hemodialysis with AKI or CKD diagnosis at a public hospital in Lima, Peru. Dysnatremias were categorized as hyponatremia (Na < 135mmol/L) or hypernatremia (Na > 145mmol/L), and dyschloremias were defined as hypochloremia (Cl < 98 mmol/L) or hyperchloremia (Cl > 109mmol/L). The outcome of interest was mortality during hospitalization. We performed generalized lineal Poisson family models with bias-corrected and accelerated non-parametric bootstrap to estimate the risk ratios at crude (RR) and adjusted analysis (aRR) by gender, age, HCO3 (for all patients) and Liaño score (only for AKI) with CI95%. Results: We included 263 patients (mean age: 54.3 years, females: 43%): 191 with CKD and 72 with AKI. Mortality was higher in patients with AKI (59.7%) than in patients with CKD (14.1%). In overall, patients with hypernatremia had a higher mortality during hospitalization compared to those who had normal sodium values (aRR: 1.82, 95% CI: 1.17-2.83); patients with hyponatremia did not have different mortality (aRR: 0.19, 95% CI: 0.69-2.04). We also found that hyperchloremia (aRR: 1.35, 95% CI: 0.83-2.18) or hypochloremia (aRR: 0.66, 95% CI: 0.30-14.78) did not increase mortality in comparison to normal chloride values. No association between dysnatremias or dyschloremias and mortality during hospitalization was found in CKD and AKI subgroups. Conclusions: In our exploratory analysis, only hypernatremia was associated with mortality during hospitalization among patients with AKI or CKD undergoing acute hemodialysis.

Resumo Objetivo: Avaliar a associação entre distúrbios do sódio ou do cloro e mortalidade hospitalar de pacientes com insuficiência renal aguda (IRA) ou doença renal crônica (DRC) submetidos a hemodiálise aguda. Métodos: O presente estudo de coorte retrospectiva incluiu pacientes adultos submetidos a hemodiálise aguda com diagnóstico de IRA ou DRC em um hospital público de Lima, Peru. Os distúrbios do sódio foram classificados como hiponatremia (Na < 135mmol/L) ou hipernatremia (Na > 145mmol/L), enquanto os distúrbios do cloro foram classificados como hipocloremia (Cl < 98 mmol/L) ou hipercloremia (Cl > 109mmol/L). O desfecho de interesse foi mortalidade hospitalar. Utilizamos modelos de Poisson da família de modelos lineares generalizados com bootstrap não-paramétrico e correção de viés acelerado para estimar os riscos relativos na análise bruta (RR) e ajustada (RRa) para sexo, idade, HCO3 (para todos os pacientes) e escore de Liaño (apenas para IRA) com IC 95%. Resultados: Foram incluídos 263 pacientes (idade média 54,3 anos; 43% do sexo feminino), 191 com DRC e 72 com IRA. A mortalidade foi mais elevada nos pacientes com IRA (59,7%) do que nos indivíduos com DRC (14,1%). No geral, os pacientes com hipernatremia tiveram mortalidade hospitalar mais elevada do que os indivíduos com valores normais de sódio (RRa: 1,82; IC 95%: 1,17-2,83). Os pacientes com hiponatremia não apresentaram mortalidade diferente (RRa: 0,19; IC 95%: 0,69-2,04). Também identificamos que hipercloremia (RRa: 1,35; IC 95%: 0,83-2,18) e hipocloremia (RRa: 0,66; IC 95%: 0,30-14,78) não elevaram a mortalidade em comparação a indivíduos com níveis normais de cloro. Não foi encontrada associação entre distúrbios do sódio ou do cloro e mortalidade hospitalar nos subgrupos com DRC e IRA. Conclusões: Em nossa análise exploratória, apenas hipernatremia apresentou associação com mortalidade hospitalar em pacientes com IRA ou DRC submetidos a hemodiálise aguda.

Cobertura de aseguramiento en salud: el caso peruano desde la Ley de Aseguramiento Universal / Health insurance coverage: the peruvian case since the universal insurance act

RESUMEN Objetivo. Describir la evolución de la cobertura de aseguramiento en salud (CAS) en Perú para el periodo 2009-2017 y evaluar los principales factores demográficos, sociales y económicos asociados. Materiales y métodos. Realizamos un análisis secundario de la Encuesta Nacional de Hogares. Para cada año estimamos la CAS global, del Seguro Integral de Salud (SIS) y del Seguro Social en Salud (EsSalud), y realizamos pruebas de tendencias anuales. Para los años 2009 (Ley de Aseguramiento Universal en Salud), 2013 (reforma del sector salud) y 2017, construimos una variable politómica del tipo de aseguramiento (SIS/EsSalud/No asegurado) y estimamos razones relativas de prevalencia (RRP) con intervalos de confianza (IC) al 95% mediante modelos logísticos multinomiales para muestras complejas. Resultados. Observamos un incremento en la CAS global (2009: 60,5%; 2013: 65,5%; 2017: 76,4%), en el SIS (2009: 34%; 2013: 35,4%; 2017: 47%) y en EsSalud (2009: 22,8%; 2013: 26,4%; 2017: 26,3%). Observamos que ser mujer aumentó la posibilidad de afiliación al SIS (RRP=2009: 1,64 y 2017: 1,53), mientras que tener entre 18 y 39 años, residir Lima Metropolitana y ser no pobre redujeron esa posibilidad (RRP=2009: 0,16 y 2017: 0,31; 2009: 0,17 y 2017: 0,37; 2009: 0,51 y 2017: 0,53; respectivamente). Por su parte, ser mujer, tener más de 65 años, ser del ámbito urbano, residir en Lima Metropolitana y ser no pobre aumentó la probabilidad de estar afiliados a EsSalud (RRP=2013: 1,12 y 2017: 1,24; 2013: 1,32 y 2017: 1,34; 2009: 2,18 y 2017: 2,08; 2009: 2,14 y 2017: 2,54; 2009: 3,57 y 2017: 2,53; respectivamente). Conclusiones. La CAS ha incrementado durante el periodo 2009-2017. No obstante, las características de la población asegurada difieren de acuerdo con el tipo de seguro.

ABSTRACT Objective. To describe the trends in health insurance coverage (HIC) in Peru during the period 2009-2017 and evaluate associations with demographic, social and economic factors. Materials and Methods. We carried out a secondary data-analysis from the Peruvian National Household Survey. For each year, we estimated the global HIC, for the Integral Health Insurance (SIS) and the Social Security system (EsSalud). In addition, we performed a trend analysis. For 2009 (Universal Health Insurance Act), 2013 (health care reform act) and 2017, we used a polytomous variable for the insurance type (SIS/EsSalud/Non-affiliated). We performed logistic multinomial regressions to estimate relative prevalence ratios (RPR) and their 95% CI with correction for complex sampling. Results. We observed an increasing trend in the global HIC (2009:60.5%; 2013:65.5%; 2017:76.4%), SIS coverage (2009:34%; 2013:35.4%; 2017:47%) and EsSalud coverage (2009:22.8%; 2013:26.4%; 2017:26.3%). Multinomial logistic regressions showed that being a woman increased the likelihood to be affiliated to the SIS (RPR= 2009:1.64 and 2017:1.53), while people between 18 and 39 years old, living in Lima Metropolitan area under non-poverty conditions reduced the likelihood to be affiliated to the SIS (RPR= 2009:0.16 and 2017:0.31; 2009:0.17 and 2017:0.37; 2009:0.51 and 2017:0.53; respectively). Furthermore, being a woman, 65 years old or over, living in urban Lima, and under non-poverty conditions increased the likelihood of being affiliated with the EsSalud (RPR= 2013:1.12 and 2017:1.24; 2013:1.32 and 2017:1.34; 2009:2.18 and 2017:2.08; 2009:2.14 and 2017:2.54; 2009:3.57 and 2017:2.53; respectively). Conclusions. HIC has increased during the period 2009-2017. However, the characteristics of those affiliated are different between the various types of health insurance.

Diferencias institucionales en el insuficiente acceso efectivo a medicamentos prescritos en instituciones prestadoras de servicios de salud en Perú: análisis de la Encuesta Nacional de Satisfacción de Usuarios de los Servicios de Salud (ENSUSALUD 2014) / Institutional differences in the ineffective access to prescription medication in health care centers in Peru: analysis of the National Survey on User Satisfaction of Health Services (ENSUSALUD 2014)

RESUMEN Objetivos Estimar la prevalencia de insuficiente acceso efectivo a medicamentos (IAEM) y sus factores asociados en usuariosque reciben prescripción médica en la consulta ambulatoria de instituciones prestadoras de servicios de salud (IPRESS) en Perú. Materiales y métodos Se realizó un análisis secundario de la Encuesta Nacional de Satisfacción de Usuarios en Salud (ENSUSALUD) del año 2014; estudio con muestreo probabilístico bietápico a nivel nacional en IPRESS del Ministerio de Salud y Gobiernos Regionales (MINSA-GR), Seguro Social de Salud (EsSalud), Fuerzas Armadas y Policiales (sanidades), y Clínicas del sector privado. El IAEM se definió como la dispensación incompleta o de ningún medicamento en la farmacia de la IPRESS. Se realizaron modelos lineales generalizados y se estimaron razones de prevalencia (RP) con IC 95% para muestreo complejo. Resultados De los 13 670 entrevistados, el 80,9% (IC 95%: 79,9-81,8%) recibieron indicación de medicamentos, y de éstos el 90,8% (IC 95%: 90,1-91,6%) los solicitaron en la farmacia de la IPRESS, donde el 30,6% (IC 95%:28,8-32,4%) tuvo IAEM. El ser atendido en el MINSA-GR (RP: 4,8; IC95%: 3,5-6,54) y en las sanidades (RP: 3,21; IC 95%: 2,3-4,5), el ser de la tercera edad (RP: 1,17; IC 95%: 1,04-1,34) y el pertenecer al quintil más pobre (RP: 1,21; IC 95%: 1,05-1,41) incrementaron la probabilidad de IAEM. Asimismo, los pacientes atendidos por una enfermedad de menos de 15 días (RP: 1,37; IC 95%: 1,05-1,79) y de 15 días a más (RP: 1,51; IC 95%: 1,16-1,97) tuvieron una mayor prevalencia de IAEM que aquellos atendidos por embarazo u otros controles. Conclusiones El IAEM está asociado al subsistema de salud, edad, pobreza y tipo de consulta realizada. Se sugieren implementar estrategias para fomentar el acceso a medicamentos en la población peruana.

ABSTRACT Objectives To estimate the prevalence of ineffective access to drugs (IAD) and associated factors in patients receiving a prescription in an outpatient clinic in Peru. Materials and Methods We performed a secondary data-analysis of the National Survey on User Satisfaction of Health Services (ENSUSALUD 2014), a two-stage population-based study carried out in health care centers of the Ministry of Health and Regional Governments (MOHRG), Social Security (EsSalud), Armed Forces and Police (AFP) and the private sector across all 25 regions of Peru. IAD was defined as incomplete or no dispensing of any prescribed medication in the health care center pharmacy. Generalized linear models with Poisson distribution for complex survey sampling were fit to estimate prevalence ratios (PR) and 95% confidence intervals (CI). Results Out of 13,360 participants, 80.9 % (95% CI: 79.9-81.8) had an active prescription, and of those, 90.8 % (95% CI: 90.1-91.6) sought their medications in a health care center pharmacy, where 30.6 % (95% CI 28.8-32.4) had IAD. In the multiple regression model, receiving medical attention in the MOHRG (PR 4.8; 95%CI: 3.5-6.54) or AFP (PR: 3.2; 95%CI: 2.3-4.5), being over 60 years old (PR: 1.17; 95%CI: 1.04-1.34) and being in the poorest income quintile (PR: 1.05; 95%CI: 1.05-1.41) increased IAD. Furthermore, in contrast to seeking care for pregnancy or other routine control, IAD was also more common for medical consultation for diseases diagnosed in the last 15 days (PR: 1.37; 95% CI: 1.05-1.79) or more than 15 days prior (PR: 1.51; 95% CI: 1.16-1.97). Conclusions In Peru, IAD is associated with the provider institution, older age, poverty and the reason for medical consultation. We suggest strategies to promote access to medicines, especially in the most disadvantaged segments of the Peruvian population.

Mortalidade dos pacientes com doença renal crônica em hemodiálise de manutenção em um hospital público do Peru / Mortality in patients with chronic kidney disease undergoing hemodialysis in a public hospital of Peru

Resumo Introdução: O Ministério da Saúde do Peru não tem um programa nacional de hemodiálise e os hospitais que oferecem este tipo de tratamento apresentam problemas de cobertura que podem resultar em aumento da mortalidade. Objetivo: Avaliar a mortalidade da população incidente em hemodiálise em um hospital de Lima. Métodos: Análise da população acima de 18 anos que iniciou o tratamento entre 1 de janeiro de 2012 e 31 de dezembro de 2013, com data de corte final do acompanhamento em 31 de março de 2014. Foi realizada regressão logística bivariada e multivariada dos fatores associados com a mortalidade e usadas as curvas de Kaplan-Meier para determinar a probabilidade de sobrevivência durante o acompanhamento. Resultados: Foram incluídos 235 pacientes para estudo, com idade média de 56,4 ± 15,8 anos. A mediana de acompanhamento foi 0,6 anos (IQR 0,3 a 1,5). A pesquisa mostra que 50% dos pacientes abandonaram o tratamento durante o estudo por falta de vagas ou recursos econômicos. No final do terceiro mês, a mortalidade foi 37,7% (IC 95% 29,3 a 48,5) e 49,5% (IC 95% 38,8 a 61,4) ao sétimo mês. A mortalidade foi menor quando o paciente tinha mais de seis meses com diagnóstico de doença insuficiência renal crônica (OR = 0,39 [IC 95% 0,12-1,27]) e quando o paciente ingressava à diálise programada (OR = 0,28 [IC 95% 0,01 a 2,28]). Conclusão: Metade dos pacientes foi a óbito no sétimo mês de seguimento. Ter ingressado com diálise programada e ter mais tempo de diagnóstico foi associado à menor mortalidade. .

Abstract Introduction: The Peruvian Ministry of Health does not have a national program of hemodialysis and hospitals that offer it have coverage problems, which may result in increased mortality. Objective: We evaluated mortality of a population with incident hemodialysis in a Peruvian public hospital as well as its associated factors. Methods: Retrospective and descriptive study of a population over 18 years-old who started treatment between January 1, 2012 and December 31, 2013 with the final follow-up day on31 March 2014. We used bivariate and multivariate logistic regression models to evaluate factors associated with mortality and Kaplan Meier curves were used to determine the probability of survival. Results: We included 235 patients with a mean age of 56.4 ± 15.8 years. Median follow-up was 0.6 years (IQR 0.3 to 1.5). 50% of years withdrew from therapy during the study for lack of financial resources or space available. The third month mortality was 37.7% (95% CI 4.7 to 48.5) and 49.5% (95% CI 5.8 to 61.4) at 7 months. There was a trend towards lower mortality when patients had more than 6 months with a diagnosis of chronic kidney disease (CKD) (OR = 0.39 [95% CI 0.12 to 1.27]) and when the patient was admitted with scheduled dialysis (OR = 0.28 [95% CI 0.01 to 2.28]). Conclusion: Half of patients died within seven months of follow-up. Scheduled dialysis and having longer time with CKD diagnosis tend to be associated with lower mortality .

Baja adherencia al régimen de hemodiálisis en pacientes con enfermedad crónica renal en un hospital de referencia del Ministerio de Salud en Perú / Low adherence to hemodialysis regime in patients with chronic renal disease in a Peruvian Ministry of Health reference hospital

Introducción: La ausencia a una sesión mensual en un esquema de diálisis convencional puede incrementar la mortalidad en 30 por ciento. Objetivos: Describir la frecuencia y la percepción de las causas de falta de adherencia a diálisis en una población prevalente de un hospital público de referencia nacional en Perú. Diseño: Estudio descriptivo. Institución: Servicio de Nefrología, Hospital Nacional 2 de Mayo, Lima, Perú. Participantes: Pacientes con más de un año en diálisis Intervenciones: Se determinó el número de faltas y se aplicó un cuestionario para describir su percepción respecto a las causas de las faltas, validado por juicio de expertos. Principales medidas de resultados: Baja adherencia a diálisis definida como: pacientes con más de una falta al mes o más de 12 faltas, entre julio de 2012 y julio de 2013. Resultados: Se incluyó 54 pacientes, 27 eran varones, con una edad y tiempo de diálisis promedio de 57 ± 16,4 años y 40,6 ± 11,5 meses, respectivamente; 7/54 pacientes tenían educación superior. Hubo 504 faltas (5,45 por ciento). El segundo día de la programación semanal fue el día con mayor frecuencia de faltas (292), seguido del tercer día (145); 13/54 tuvieron baja adherencia. Las principales causas reportadas fueron: una residencia alejada (6/13), la sensación de bienestar (6/13), el contar con escasos recursos económicos para solventar el traslado (5/13). Conclusiones: Uno de cada cuatro pacientes tuvo baja adherencia. El residir lejos o que se sintiera bien fueron las principales causas de la baja adherencia...

Background: Failing to attend a monthly session within a scheme of conventional dialysis may increase mortality by 30 per cent. Objectives: To describe the frequency and perceived causes of non-adherence to dialysis in a Peruvian national reference public hospital. Design: Descriptive study. Setting: Nephrology department, Hospital Nacional 2 de Mayo, Lima, Peru. Participants: Patients with more than one year on dialysis. Interventions: The number of absences to appointed sessions was determined and a validated questionnaire was used to describe perceptions regarding the causes of absences. Main outcomes measures: Low adherence to dialysis defined as patients with more than one absence per month or more than 12 absences between July 2012 and July 2013. Results: The study included 54 patients, of which 27 were male. Average age was 57 ± 16.4 years and average time on dialysis was 40.6 ± 11.5 months. Only 7 patients had higher education. There were 504 absences (5.45 per cent). The second day of the weekly schedule was the day with more absences (292), followed by the third day (145). Overall 13 patients showed low adherence. Main causes of absence reported included a remote residence (6/13), feeling good (6/13), and insufficient financial resources to cover transportation costs (5/13). Conclusions: A quarter of patients had low adherence, and main factors were distance to health facility and wellbeing self-perception...

Alteraciones hematológicas en trabajadores expuestos ocupacionalmente a mezcla de benceno- tolueno-xileno (BTX) en una fábrica de pinturas / Blood disorders among workers exposed to a mixture of benzene-toluene-xylene (BTX) in a paint factory

Objetivos. Evaluar las tres series celulares sanguíneas e identificar la presencia de hipocromía, macrocitosis, leucopenia, linfocitopenia y trombocitopenia en un grupo de trabajadores expuestos a la mezcla de benceno-tolueno-xileno (BTX). Materiales y métodos. Estudio transversal donde se incluyó a 97 trabajadores de una empresa de pinturas de México a los que se les realizó una biometría hemática convencional y les fue estimada la exposición a través de la dosis diaria potencial acumulada para vapores de BTX. Resultados. Del total de trabajadores, 19,6%, mostró macrocitosis, 18,6%, linfocitopenia, 10,3% hipocromía, 7,2% trombocitopenia y 5,2% leucopenia. La asociación cruda de macrocitosis con exposición a dosis alta de mezcla de BTX fue la única significativa (OR:3,6; IC95%: 1,08 - 13,9; p=0,02) y en la que se estructuró un modelo de regresión logística (OR:6,7; IC95%: 1,33 - 13,55; p:0,02) ajustada por edad, consumo de alcohol y tabaquismo. Conclusiones. Todos los componentes citohemáticos analizados mostraron cambios leves; que podrían estar asociados con la exposición a la mezcla de BTX. De ellos, la macrocitosis podría constituirse en una manifestación precoz que merece ser vigilada.

Objectives. Evaluate the three blood cell series and identify the presence of hypochromia, macrocytosis, leucopenia, lymphopenia, and thrombocytopenia in a group of workers exposed to the mixture of benzene-toluene-xylene (BTX). Materials and methods. A cross-sectional study which included 97 workers from a paint factory in Mexico. The participants underwent conventional blood count and tests for potential cumulative daily dose of BTX fumes, to estimate exposure. Results. From the total of workers, 19.6% showed macrocytosis, 18.6%, lymphopenia, hypochromia 10.3%, 7.2% and 5.2% thrombocytopenia leukopenia. The crude association of macrocytosis with exposure to high doses of BTX mixture was the only with statistical significance (OR: 3.6, 95% CI 1.08 to 13.9, P = 0.02), and the base for a logistic regression model (OR: 6.7, 95% CI 1.33 to 13.55, P = 0.02) adjusted for age, alcohol consumption, and smoking. Conclusions. All blood cytological components analyzed demonstrated mild changes, potentially associated with exposure to the mixture of BTX. Macrocytosis could constitute an early manifestation worthy for surveillance.