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Basic Functions for Computational Implementation of the Box-Cox Symmetric Class of Distributions

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Open Journal of Statistics 2021年第6期11卷 1010-1016页

作者： giovana fumes-Ghantous José Eduardo Corrente Basic Science Department Faculty of Animal Science and Food Engineering University of S&atilde o Paulo S&atilde o Paulo Brazil Research Support Office Botucatu Medical School University of S&atilde o Paulo State Botucatu Brazil

A class of distributions called Box-Cox symmetric was proposed for random variables with asymmetric distributions. This class allows through its structure an interpretation of the parameters in terms of quantiles (in particular, the median), relative dispersion and skewness. This study presents the initial results of the computational development of basic functions of each of the distributions that make up the Box-Cox symmetric class. Four functions have been developed to compose a routine in software R up to now. These functions are related to random numbers generation, probability density function, cumulative distribution function, and quantile function associated to a given probability. Examples of implemented functions were presented. The gamlss routine was used to check the performance of developed functions.

关键词： Asymmetric Distributions Basic Functions Box-Cox Symmetric Class

Factors Associated with Physical-Activity Performance by Older Individuals in a Medium-Sized City in S^o Paulo State, Brazil

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Journal of Life Sciences 2013年第2期7卷 210-218页

作者： Jos Eduardo Corrente giovana fumes Tania Ruiz Biostatistics Department Biosciences Institute of Botucatu UNESP S6o Paulo18618-970 Brazil MsC in Biometry Biostatistics Department Biosciences Institute of Botucatu UNESP Botucatu Sao Paulo18618-970 Brazil Public Health Department Botucatu School of Medicine UNESP Botucatu Sao Paulo18618-970 Brazil

Physical activity has been scientifically discussed as fundamental in the process of healthy ageing. Hence, this study aimed at determining the factors that influence older people to perform physical activities. The complete IPAQ （International Physical Activity Questionnaire） was applied to a population-based sample consisting of 364 elderly persons in the city of Botucatu, SAo Paulo, Brazil. Days of physical activity performed by the older people were considered by taking into account household and leisure activities. Models for count data were fitted by including socio-demographic variables as well as those related to life satisfaction. It was shown that housework physical-activity performance is associated with female, who predominantly showed to be more active in all levels. Male seemed to be more predisposed to perform lighter recreation, sports and leisure-time physical activities, such as walking. Additionally, poor schooling showed to he decisive for not performing physical activities both at home and during leisure.

关键词： Older people physical activity models for count data.

Growth Curves for Diameter and Height Using Mixed Models: An Application in Eucalyptus Seedling

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Open Journal of Forestry 2017年第4期7卷 403-415页

作者： giovana fumes Clarice Garcia Borges Demé trio Cristian Villegas José Eduardo Corrente Juliane fumes Bazzo Department of Exact Sciences ESALQ University of S&#227 o Paulo Piracicaba Brazil Department of Biostatistics University of S&#227 o Paulo State Botucatu Brazil Department of Natural Resources-Forest Sciences University of S&#227 o Paulo State Botucatu Brazil

The growth of a tree or a forest settlement is of great value to a forest enterprise, because many decisions are directly dependent of this information, for instance, determining the optimal cutting age. This study aims to apply a new class of models to fit growth curves for diameter and height of Eucalyptus grandis X Eucalyptus urophylla seedling data. Data were collected from a trial conducted in a green house at the Natural Resources Department at School of Agriculture, Botucatu, S?o Paulo, Brazil. The experiment’s design was completely randomized with eight treatments and four replications. In this trial, the growth variables referring to the height and the diameter were evaluated, being measured five and four times, respectively. The methodology was carried in a mixed longitudinal model using a new approach based on Box-Cox Normal (BCN) distribution, and comparisons with this model were made assuming normality of the data. The results revealed that the BCN mixed model provided similar results to the standard model in order to estimate growth curves;however, the BCN model was the best result according to Akaike criterion, considering the slight asymmetry in the data set. This approach is of great interest in case of outliers and robust procedures for parameter estimation.

关键词： Box-Cox Normal Distribution Gompertz Model Longitudinal Data

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Health 2020年第12期12卷 1562-1574页

作者： giovana fumes-Ghantous José Eduardo Corrente Ana Flavia G. Tatis Basic Sciences Department Faculty of Animal Science and Food Engineering University of S&#227 o Paulo Pirassununga Brazil Research Support Office Botucatu Medicine School University of S&#227 o Paulo State Botucatu Brazil Faculty of Animal Science and Food Engineering University of S&#227 o Paulo Pirassununga Brazil

Introduction: It is a fact that the elderly population has been increasing all around the world and also in Brazil. This has been a challenge for governments and managers in the development of public policies to promote healthy and quality aging. And one of the conditions for healthy aging is to assess the functional capacity and quality of life of elderly people. Objective: The aim of the present study was to evaluate the factors that influence the loss of functional capacity and the worsening of the quality of life of a representative sample of elderly people from a medium-sized city in the inner of São Paulo State, Brazil. Methodology: Questionnaires about activities of daily living (ADL), instrumental activities of daily living (IADL), Flanagan quality of life scale (FQOLS), sociodemographic and morbidities aspects were applied to the elderly people. In order to assess associated factors to functional capacity and quality of life, chi-square tests and logistic regression models were fitted including variables: gender, age group, marital status, income, education level, body mass index, abdominal circumference and some morbidities reported by the elderly people. The level of significance adopted for the statistical tests was 5%. Results: Elderly with age over 75 years old and not married had more risk to be dependent on ADL, while elderly with more than 75 years old, not married, income below one minimal wage, cardiovascular disease and be diabetic had more risk to be dependent by IADL. Already, people with excess of weight had smallest risk to be dependent by IADL, paradoxically. The elderly not married and with an income below a minimum wage had the worst quality of life. Conclusions: Population aging in Brazil is an evident factor, so it is hoped that this study will contribute to the greatest diligence on the issues of the elderly

关键词： Functional Capacity Life Quality Odds Ratio Risk Factors

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Food and Nutrition Sciences 2023年第10期14卷 984-996页

作者： Ellen Rodrigues dos Santos José Eduardo Corrente Rachel Santos Bueno Carvalho giovana fumes-Ghantous Department of Basic Sciences Faculty of Animal Science and Food Engineering University of S&#227o Paulo Pirassununga Brazil Research Support Group S&#227o Paulo State University “Júlio de Mesquita Filho” Botucatu Brazil

This study aimed to evaluate the features related to consumers’ reading nutritional labels in a city in the interior of the São Paulo State, Brazil. A questionnaire was answered by 100 consumers of a supermarket chain, sociodemographic information and data related to label reading habits were collected. Tables with percentage values and bar graphs were used. Chi-square tests and logistic regression models were performed to verify the association between the variables and the label reading habits. The factors that showed significant associations with the reading labels were gender, ease to understand the labels and access to their information (p 0.10). People who had already read labels reported to have more difficulty to understand the information contained on them, and people who had already received instructions on the labels were three and a half times more likely to read the instructions contained on them than those who hadn’t received any guidance. This study points to the need to expand the disclosure to consumers about the contents present on the labels, through more accessible language, so that the labels fulfill their role to instruct consumers in their choices.

关键词： Association Tests Label Logistic Regression