نتایج جستجو برای: hidden populations
تعداد نتایج: 302749 فیلتر نتایج به سال:
background : a detailed study of hidden and hard to reach populations in order to identify their characteristics is essential because they endanger the health of the society by their dangerous behaviors. however, sampling in these populations through conventional sampling methods is impossible due to reasons such as being hidden and lacking a precise frame. methods: in this article, applicable ...
Knowing the population size of rare diseases or special subpopulations like injection drug users (IDUs) is one of the most important challenges in public health and health surveillance systems but it is difficult to estimate these groups. During the last few years, new methods have been suggested to estimate hidden or hard-to-reach populations, one of which is the network scale-up method (NSUM)...
Objectives: Study of hidden populations such as Injection Drug Users (IDU) due to their exposing to high risk diseases and their roll in public health is very crucial. Conventional statistical methods for sampling these populations are not applicable because of the restrictions these populations are faced. Despite the introduction of respondent driven sampling as a successful method for samplin...
Sampling hidden populations is challenging due to the lack of convenience statistical frames. Since most populations exposed to special diseases are hidden and hard to reach, sampling methods that produce representative and efficient samples from the populations have become a study subject for researches all over the world. Because of the unknown probability of selecting samples in conventional...
in current study, 63 samples of bat populations collected from differ regions were used for evaluating the geographic variations. twenty cranial and dental characters for traditional morphometric and landmarks method on the ventral, dorsal skull and mandible for geometry morphometric studies were used. statistical analyses of traditional morphometric and geometry morphometric data indicated low...
background: more than a billion people have some form of disabilities worldwide. persons living with a disability have many needs (including physically, mentally, and socially needs). estimating the size of disabled population is a challenge in health systems. an innovative indirect method to estimate the size of populations is network scale up (nsu) having widely used for hidden populations. t...
Background: Estimation of the size of hidden and hard-to-reach sub-populations, such as drug-abusers, is a very important but difficult task. Network scale up (NSU) is one of the indirect size estimation techniques, which relies on the frequency of people belonging to a sub-population of interest among the social network of a random sample of the general population. In this study, we estimated ...
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