Uso da distribuição Weibull Inversa na análise de sobrevivência

Detalhes bibliográficos
Ano de defesa: 2024
Autor(a) principal: Barroso, Rodrigo Fernando Murça
Orientador(a): Cancho, Vicente Garibay lattes
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de São Carlos
Câmpus São Carlos
Programa de Pós-Graduação: Programa Interinstitucional de Pós-Graduação em Estatística - PIPGEs
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Área do conhecimento CNPq:
Link de acesso: https://repositorio.ufscar.br/handle/20.500.14289/21225
Resumo: Survival analysis is widely used in fields such as medicine, engineering, and social sciences to model and predict the time until the occurrence of events of interest. Although the Weibull distribution is commonly applied, its limitations in scenarios with a high probability of early failures and extreme events motivate the search for alternatives. This study investigates the Inverse Weibull (WI) distribution, describing its structural properties, including hazard, survival, and quantile functions. For uncensored data, inference techniques based on the maximum likelihood method are developed to estimate the parameters and the median time in the WI model. Additionally, hypothesis tests for the parameters of the WI model are applied and compared in terms of Type I error and power. The WI model is then extended to regression for censored data, with point and asymptotic inference methods applied to the parameters and median time in proportional hazards, proportional odds, and accelerated failure time models. This study expands the applications of the WI distribution in survival analysis and provides methodological foundations for its implementation in practical contexts, as all the proposed models were evaluated through simulation studies and applied to real datasets.