Extensions of the Cox model to analyse multiple time-to-event data

Sala 6.4.30, FCUL, Lisboa

Por Ivo Sousa-Ferreira (Faculdade de Ciências da Universidade de Lisboa).

Abstract: In longitudinal studies, it is very usual that a subject can experience several events, which can result from the occurrence of multiple-type events or the repetition of a single-type event (known as recurrent events). This kind of data arises in a wide variety of settings such as in biomedical studies on relapses of a certain disease.

Over the past four decades, several extensions of the Cox model have been suggested to analyse multiple time-to-event data. Some of the most applied models were proposed by: Prentice, Williams and Peterson (PWP); Andersen and Gill (AG); Wei, Lin e Weissfeld (WLW); and Lee, Wei and Amato (LWA).

The aim of this seminar is to carry out a brief, but careful, description of these four models. Moreover, another goal is to provide useful and practical guidelines to support the choice of the most appropriate model for each situation. Bearing this in mind, it will be illustrated how these models are implemented in R statistical software through the analysis of bladder cancer recurrences data available as a part of the survival package. The R code for fitting each model is also provided.

CEAUL - Centro de Estatística e Aplicações da Universidade de Lisboa

Speaker: Andrei Sipos (TU Darmstadt & Institute of Mathematics of the Romanian Academy).

Face à emergência da pandemia da COVID-19, a 6.ª edição da Escola de Verão de Energia da Faculdade de Ciências da ULisboa, prevista para 6 a 10 de julho de 2020, será adiada para data a definir em 2021.

CoastNet - Rede Portuguesa de Monitorização Costeira é uma infraestrutura de investigação MARE, que faz parte do Roteiro Nacional de Infraestruturas de Investigação de Interesse Estratégico (RNIE-FCT). Através do seu funcionamento est

Speaker: Elvira Zappale (Università Degli Studi di Salerno).

Cancelamento motivado pela aplicação do plano de contingência da Faculdade de Ciências da Universidade de Lisboa, na sequência das orientações da Direção-Geral de Saúde e das recomendações por parte da Reitoria da Universidade de Lisboa, relativamente ao novo Coronavírus (CO

Apresentações de Andreia Figueiredo (Ciências ULisboa) e Paula Silva (ICBAS.UPorto / Science & Wine).

Candidaturas a decorrer até ao dia 15 de julho de 2020.

IN3+  | Um Milhão para a Inovação.

O prémio IN3+ destina-se a todos os investigadores pertencentes às entidades que integram a Rede Inovação INCM.

Cancelamento motivado pela aplicação do plano de contingência da Faculdade de Ciências da Universidade de Lisboa, na sequência das orientações da Direção-Geral de Saúde e das recomendações por parte da Reitoria da Universidade de Lisboa, relativamente ao novo Coronavírus (COVID-1

Speaker: Gonçalo Tabuada (FCTUNL).

New date: September 14th-16th, 2020.

Ciências ULisboa associa-se ao maior evento mundial sobre inovação para a sustentabilidade - “The Planetiers World Gathering” - que terá lugar no Altice Arena entre 21 e 23 de outubro de 2020, sob os auspícios da

Programa de Formação Contínua de Professores do Ensino Básico (3.º ciclo) e Secundário, grupos 420 e 520.

Leitura e escrita são a base fundacional de todas as literacias e a condição primeira para o juízo compreensivo e crítico, o enriquecimento cultural, a formação estética e a memória individual e coletiva das sociedades.

Overview: Currently, climate changes or alterations are known to be reflected on the stable isotope ratios of Hydrogen, Nitrogen, Carbon, Oxygen and Sulphur present in atmospheric gas forms, fresh or ocean water, as well as in plants and animals and organi

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New date: 30 August - 03 September 2021.

This conference is the 22nd in the series of triennial conferences which bring together the Particle and Nuclear Physics communities.