25 documents found, page 1 of 3

Sort by Issue Date

Bayesian Modelling of Time Series of Counts with Missing Data

Silva, Isabel; Silva, Maria Eduarda; Pereira, I

The presence of missing data poses a common challenge for time series analysis in general since the most usual requirement is that the data is equally spaced in time and therefore imputation methods are required. For time series of counts, the usual imputation methods which usually produce real valued observations, are not adequate. This work employs Bayesian principles for handling missing data within time ser...


Higher Risk of Preterm Twin Delivery Among Shorter Nulliparous Women

Simões, T; Pereira, I; Gomes, L; Brás, S; Nogueira, I; Queirós, A

Objective: To determine if maternal height in nulliparous women influences pregnancy results in twin pregnancies. Material and methods: Retrospective cohort analysis evaluating twin pregnancies followed at Centro Hospitalar Universitário Lisboa Central, between 1995 and 2020. Of the 2900 pregnancies followed in that period, 886 nulliparous women with dichorionic twin pregnancies were selected. Two groups were c...


What, How and Where They Eat: Results from a Portuguese company's Employees

Lima, PM; Boleta, A; Enes, H; Pereira, I; Pereira, R; Pereira, J; Simões, H; Rocha, Ada

Background The workplace is recognized by the World Health Organization as suitable for health promotion, as it can contribute to the reduction of harmful lifestyles, promoting the development of enterprises and, in turn, economic growth. The purpose of this study was to characterize eating habits and determinants of food consumption from a Portuguese company of employees. Methods: To characterize the nutrition...


VALIDATION OF HIGH RISK CRITERIA IN MEDICATION RECONCILIATION IN MAJOR ORTHOPED...

Luque, J; Cavalheiro, M; Silva, P; Filipe, H; Falcao, F; Caldeira, D; Costa, J; Fernandes, R; Pereira, I; Lavrador, M; Castel Branco, M; Fresco, P


Immune and Spermatogenesis-Related Loci are Involved in the Development of Extr...

Cerván-Martín, M; Tüttelmann, F; Lopes, AM; Bossini-Castillo, L; Rivera-Egea, R; Garrido, N; Lujan, S; Romeu, G; Santos-Ribeiro, S; Castilla, JA

We conducted a genome-wide association study in a large population of infertile men due to unexplained spermatogenic failure (SPGF). More than seven million genetic variants were analysed in 1,274 SPGF cases and 1,951 unaffected controls from two independent European cohorts. Two genomic regions were associated with the most severe histological pattern of SPGF, defined by Sertoli cell-only (SCO) phenotype, name...


Topical minoxidil-loaded nanotechnology strategies for alopecia

Santos, AC; Pereira-Silva, M; Guerra, C; Costa, D; Peixoto, D; Pereira, I; Pita, I; Ribeiro, A; Veiga, F

Androgenetic alopecia (AGA) is a multifactorial and age-related condition characterized by substantial hair loss affecting both men and women. Conventional treatments include the use of topical minoxidil (MNX) formulations to stimulate hair growth and restore hair condition. However, those treatments are associated with limited performance and a lack of tolerability and compliance due to the emergence of advers...


Protetização do Doente Amputado: da Teoria à Prática

Ferreira, E; Portugal, D; Dantas, B; Silva, N; Coelho, A; Soares, MJ; Patinha, D; Tomé, R; Pereira, I; Prates, L


Item pre-knowledge true prevalence in clinical anatomy-application of gated ite...

Silva-Pereira F; Severo M; Ferreira, MA; Monteiro, M; Pereira, I


In vivo systemic toxicity assessment of an oxidized dextrin-based hydrogel and ...

Pereira, I; Fraga, S; Maltez, L; Requicha, J; Guardão, L; Oliveira, J; Prada, J; Alves, H; Santos, JD; Teixeira, JP; Pereira, JE; Soares, R; Gama, FM

The worldwide incidence of bone disorders is raising, mainly due to aging population. The lack of effective treatments is pushing the development of synthetic bone substitutes (SBSs). Most ceramic-based SBSs commercially available display limited handling properties. Attempting to solve these issues and achieve wider acceptance by the clinicians, granular ceramics have been associated with hydrogels (HGs) to pr...


Bayesian Outlier Detection in Non-Gaussian Autoregressive Time Series

Maria Eduarda Silva; Pereira, I; McCabe, B

This work investigates outlier detection and modelling in non-Gaussian autoregressive time series models with margins in the class of a convolution closed parametric family. This framework allows for a wide variety of models for count and positive data types. The article investigates additive outliers which do not enter the dynamics of the process but whose presence may adversely influence statistical inference...


25 Results

Queried text

Refine Results

Author





















Date

















Document Type





Access rights



Resource





Subject