نتایج جستجو برای: Poisson regression test

تعداد نتایج: 1103181  

Journal: :Statistical Methods in Medical Research 2017

Journal: :The Southwest Respiratory and Critical Care Chronicles 2015

Journal: :medical journal of islamic republic of iran 0
fatemeh sarvi department of epidemiology and biostatistics, school of public health, hamadan university of medical science, hamadan, iran. somayeh momenian faculty member, epidemiology and biostatistics department, qom university of medical sciences, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی قم (qom university of medical sciences) mahmoud khodadost gastroenterology and liver diseases research center, baqiyatallah university of medical science, & department of epidemiology and biostatistics, iran university of medical sciences, tehran, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) bagher pahlavanzadeh department of biostatistics, shahid beheshti university of medical science, tehran, iran.سازمان اصلی تایید شده: دانشگاه شهید بهشتی (shahid beheshti university) mahshid nasehi department of epidemiology and biostatistics, iran university of medical sciences, tehran, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) eghbal sekhavati faculty member, larestan school of medical sciences, larestan, iran.

background: poverty and low socioeconomic status are the most important reasons of increasing the global burden of tuberculosis, not only in developing countries but also in developed countries for particular groups. the purpose of this study was to assess the association between socioeconomic factors and the number of tuberculosis patients using quantile regression for count data.   methods: t...

2015
Natalie A. Koziol Christopher R. Bilder

Multiple response categorical variables (MRCVs), also known as “pick any” or “choose all that apply” variables, summarize survey questions for which respondents are allowed to select more than one category response option. Traditional methods for analyzing the association between categorical variables are not appropriate with MRCVs due to the within-subject dependence among responses. We have d...

2010
KIMBERLY F. SELLERS GALIT SHMUELI

Poisson regression is a popular tool for modeling count data and is applied in a vast array of applications from the social to the physical sciences and beyond. Real data, however, are often overor under-dispersed and, thus, not conducive to Poisson regression. We propose a regression model based on the Conway–Maxwell-Poisson (COM-Poisson) distribution to address this problem. The COM-Poisson r...

2017
M. Ataharul Islam Rafiqul I. Chowdhury

A generalized right truncated bivariate Poisson regression model is proposed in this paper. Estimation and tests for goodness of fit and over or under dispersion are illustrated for both untruncated and right truncated bivariate Poisson regression models using marginal-conditional approach. Estimation and test procedures are illustrated for bivariate Poisson regression models with applications ...

رضائیان فرد, الهام, زارع, نجف, صیادی, مهراب, قائم, هاله,

Background & objectives: statistical modeling explicates the observed changes in data by means of mathematics equations. In cases that dependent variable is count, Poisson model is applied. If Poisson model is not applicable in a specific situation, it is better to apply the generalized Poisson model. So, our emphasis in this study is to notice the data structure, introducing the generalized Po...

2005
Claudia Czado

Abstract: Poisson regression models for count variables have been utilized in many applications. However, in many problems overdispersion and zero-inflation occur. In this paper we study regression models associated with the generalized Poisson distribution (Consul (1989)). These regression models which have been used for about 15 years do not belong to the class of generalized linear models co...

Journal: :journal of research in medical sciences 0
muzahem mohammed yahya al-hashimi school of mathematics and statistics, huazhong university of science and technology, wuhan, hubei, china xiangjun wang

background: iraq fought three wars in three consecutive decades, iran-iraq war (1980-1988), persian gulf war in 1991, and the iraq’s war in 2003. in the nineties of the last century and up to the present time, there have been anecdotal reports of increase in cancer in ninawa as in all provinces of iraq, possibly as a result of exposure to depleted uranium used by american troops in the last t...

2005
Felix Famoye Karan P. Singh

The generalized Poisson regression model has been used to model dispersed count data. It is a good competitor to the negative binomial regression model when the count data is over-dispersed. Zero-inflated Poisson and zero-inflated negative binomial regression models have been proposed for the situations where the data generating process results into too many zeros. In this paper, we propose a z...

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