Agreement as to the determination of the basic cause of death among children of under one year of age in Metropolitan Region of Rio de Janeiro, Brazil, 1986

An evaluation was undertaken, during the assessment of the quality of the filling up of death certificates, with the purpose of evaluating the agreement, in the determination of the basic cause of death, between the physician who certified the death and a medical team which examined the information provided by hospital records. This survey included the analysis of a sample of deaths among children under one year of age which occurred in the Metropolitan Region of Rio de Janeiro (Brazil) in the period from May 1986 to April 1987. As regards neonatal deaths, the greatest concentration of causes of death is perinatal and, despite the changes that have been observed, the composition of the main groups of causes presented no significant alteration. However, within the perinatal group, those generically classified or poorly defined causes were reduced by about 50% and new certificates were made out. Among post-neonatal deaths, we found significant changes, particularly for deaths caused by pneumonia and malnutrition. Given the great interrelation observed among the major causes of death within this group (pneumonia, diarrhoea, malnutrition), it is believed that the investigation of multiple causes of death would provide a more accurate, overall notion of the process that led to death, thus allowing the formulation of a more comprehensive view.No âmbito de um estudo sobre a qualidade do preenchimento da Declaração de Óbito, avaliou-se a concordância na determinação da causa básica da morte entre o médico que atestou o óbito e a equipe de médicos que avaliou informações do prontuário hospitalar. Estudou-se uma amostra de óbitos de menores de um ano ocorridos na Região Metropolitana do Rio de Janeiro, RJ (Brasil), de maio de 1986 a abril de 1987. Para os óbitos neonatais, as causas perinatais concentraram a maior parte dos óbitos e apesar das mudanças observadas, a composição entre os principais grupos não se alterou de modo importante. No interior do grupo de causas perinatais, conseguimos reduzir as causas classificadas de maneira genérica ou mal definidas em cerca de 50% com o preenchimento do novo atestado. Para os óbitos pós-neonatais, foram encontradas alterações significativas, em especial para os óbitos causados por pneumonia e desnutrição. Dado o grande inter-relacionamento observado entre as principais causas de morte neste grupo (pneumonia, diarréia, desnutrição), considerou-se que a apuração das causas múltiplas de morte daria uma idéia mais ampla e correta do processo que resultou na morte, permitindo uma visão mais globalizante da questão

Confiabilidade interobservador da Classificação Internacional de Cuidados Primários

OBJETIVO: A Classificação Internacional de Cuidados Primários foi desenvolvida para suprir as limitações da Classificação Estatística Internacional de Doenças e Problemas Relacionados à Saúde, 10ª revisão, quando aplicada na atenção primária de saúde. O objetivo do estudo foi avaliar a confiabilidade interobservador da Classificação Internacional de Cuidados Primários na codificação dos motivos de saúde para interrupção de atividades habituais. MÉTODOS: Foram analisados dados relativos a 801 participantes da Fase 2 (2001) do Estudo Pró Saúde, realizado com funcionários de uma universidade localizada no estado do Rio de Janeiro, que afirmaram ter ficado impedidos de realizar alguma de suas atividades habituais (trabalho, estudo ou lazer) por motivo de saúde nas duas semanas anteriores à coleta dos dados. Os motivos de saúde relatados em resposta à pergunta aberta foram codificados de maneira independente por duas classificadoras. A confiabilidade interobservador em relação ao número de motivos foi avaliada por meio do coeficiente kappa ponderado; para as demais análises (capítulos e códigos completos), empregou-se o coeficiente kappa simples. RESULTADOS: Foram codificados 1641 motivos pela primeira classificadora e 1629 pela segunda. A confiablidade interobservador em relação ao número de motivos codificados foi substancial (kappa ponderado=0,94; IC 95%: 0,93;0,94). Em relação aos códigos de capítulos e os códigos completos, foram encontradas confiabilidade substancial (kappa= 0,89; IC 95%: 0,88;0,90) e moderada (0,76; IC 95%: 0,76;0,78), respectivamente. CONCLUSÕES: Os resultados sugerem que a Classificação Internacional de Cuidados Primários é adequada para a codificação dos motivos de saúde na interrupção de atividades habituais

Confiabilidade interobservador da Classificação Internacional de Cuidados Primários

OBJECTIVE: The International Classification of Primary Care was developed as an attempt to overcome the limitations of the International Statistical Classification of Diseases and Related Health Problems, 10th revision, when used for primary health care. The aim of the study was to evaluate the interobserver reliability of the International Classification for Primary Care when coding reasons for health-related interruption of daily activities. METHODS: Data analyzed pertained to 801 subjects from Phase 2 of the Pró-Saúde Study, involving the employees of a Rio de Janeiro university who reported having been prevented from carrying out any of their usual activities (work, study, or leisure) for health-related reasons in the two weeks prior to data collection. Health problems reported in response to an open question were separately coded by two classifiers. Interobserver reliability with respect to number of health problems was calculated by weighted kappa; for the remaining analyses (chapters and full codes), crude kappa coefficients were used. RESULTS: A total of 1,641 health problems were coded by the first classifier, and 1,629 by the second. Interobserver reliability with respect to the number of health problems coded was substantial (weighted kappa=0.94; 95% CI: 0.93;0.94). Chapter and full codes showed substantial (kappa=0.89; 95% CI: 0.88;0.90) and moderate (0.76; 95% CI: 0.76;0.78) reliability, respectively. CONCLUSIONS: The results suggest that the International Classification of Primary Care is adequate for the coding of health-related reasons for interruption of daily activities.OBJETIVO: A Classificação Internacional de Cuidados Primários foi desenvolvida para suprir as limitações da Classificação Estatística Internacional de Doenças e Problemas Relacionados à Saúde, 10ª revisão, quando aplicada na atenção primária de saúde. O objetivo do estudo foi avaliar a confiabilidade interobservador da Classificação Internacional de Cuidados Primários na codificação dos motivos de saúde para interrupção de atividades habituais. MÉTODOS: Foram analisados dados relativos a 801 participantes da Fase 2 (2001) do Estudo Pró Saúde, realizado com funcionários de uma universidade localizada no estado do Rio de Janeiro, que afirmaram ter ficado impedidos de realizar alguma de suas atividades habituais (trabalho, estudo ou lazer) por motivo de saúde nas duas semanas anteriores à coleta dos dados. Os motivos de saúde relatados em resposta à pergunta aberta foram codificados de maneira independente por duas classificadoras. A confiabilidade interobservador em relação ao número de motivos foi avaliada por meio do coeficiente kappa ponderado; para as demais análises (capítulos e códigos completos), empregou-se o coeficiente kappa simples. RESULTADOS: Foram codificados 1641 motivos pela primeira classificadora e 1629 pela segunda. A confiablidade interobservador em relação ao número de motivos codificados foi substancial (kappa ponderado=0,94; IC 95%: 0,93;0,94). Em relação aos códigos de capítulos e os códigos completos, foram encontradas confiabilidade substancial (kappa= 0,89; IC 95%: 0,88;0,90) e moderada (0,76; IC 95%: 0,76;0,78), respectivamente. CONCLUSÕES: Os resultados sugerem que a Classificação Internacional de Cuidados Primários é adequada para a codificação dos motivos de saúde na interrupção de atividades habituais

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV

Performance of the CMS muon trigger system in proton-proton collisions at √s = 13 TeV

The muon trigger system of the CMS experiment uses a combination of hardware and software to identify events containing a muon. During Run 2 (covering 2015-2018) the LHC achieved instantaneous luminosities as high as 2 × 10 cm s while delivering proton-proton collisions at √s = 13 TeV. The challenge for the trigger system of the CMS experiment is to reduce the registered event rate from about 40 MHz to about 1 kHz. Significant improvements important for the success of the CMS physics program have been made to the muon trigger system via improved muon reconstruction and identification algorithms since the end of Run 1 and throughout the Run 2 data-taking period. The new algorithms maintain the acceptance of the muon triggers at the same or even lower rate throughout the data-taking period despite the increasing number of additional proton-proton interactions in each LHC bunch crossing. In this paper, the algorithms used in 2015 and 2016 and their improvements throughout 2017 and 2018 are described. Measurements of the CMS muon trigger performance for this data-taking period are presented, including efficiencies, transverse momentum resolution, trigger rates, and the purity of the selected muon sample. This paper focuses on the single- and double-muon triggers with the lowest sustainable transverse momentum thresholds used by CMS. The efficiency is measured in a transverse momentum range from 8 to several hundred GeV

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Measurement of the W gamma Production Cross Section in Proton-Proton Collisions at root s=13 TeV and Constraints on Effective Field Theory Coefficients

A fiducial cross section for W gamma production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137 fb(-1) of data collected using the CMS detector at the LHC. The W -> e nu and mu nu decay modes are used in a maximum-likelihood fit to the lepton-photon invariant mass distribution to extract the combined cross section. The measured cross section is compared with theoretical expectations at next-to-leading order in quantum chromodynamics. In addition, 95% confidence level intervals are reported for anomalous triple-gauge couplings within the framework of effective field theory.Peer reviewe

Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at root s=13 TeV

Peer reviewe

Search for long-lived particles decaying to jets with displaced vertices in proton-proton collisions at root s=13 Te V

A search is presented for long-lived particles produced in pairs in proton-proton collisions at the LHC operating at a center-of-mass energy of 13 TeV. The data were collected with the CMS detector during the period from 2015 through 2018, and correspond to a total integrated luminosity of 140 fb(-1). This search targets pairs of long-lived particles with mean proper decay lengths between 0.1 and 100 mm, each of which decays into at least two quarks that hadronize to jets, resulting in a final state with two displaced vertices. No significant excess of events with two displaced vertices is observed. In the context of R-parity violating supersymmetry models, the pair production of long-lived neutralinos, gluinos, and top squarks is excluded at 95% confidence level for cross sections larger than 0.08 fb, masses between 800 and 3000 GeV, and mean proper decay lengths between 1 and 25 mm.Peer reviewe