OBJECTIVE To describe in detail the methods followed in each of the qualitative and quantitative surveys of national health information, research and knowledge systems and research institutions. DESIGN Cross-sectional surveys. SETTING National health information and research systems, and 847 health research institutions in 42 countries in the World Health Organization (WHO) African Region. ...

To analyze the characteristics and trends of body mass index (BMI) among young men in China using data from a series of national surveys conducted between 1955 and 2012, and to provide evidence for policy making and disease control and prevention.BMI-related data were collected by routine medical examination from young men, most aged 18 to 20 years, in 4 national surveys (1955, 1974, 2001, and ...

This paper discusses the architecture and implementation of dynamic web-based surveys with an emphasis on the recently completed Survey2001 project. Survey2001 was made available at the National Geographic website for several months starting October 2001 and could be taken in four different languages: English, German, Spanish and Italian. This paper discusses surveys in general, the advantages ...

Many types of Web surveys are not based on scientific sampling and do not represent any well-defined population. Even when Web surveys are based on a generalizable sample, it is not known whether they yield reliable or valid results. One way of testing the adequacy of Web surveys is to do experiments that compare Web surveys to well-established, traditional survey modes. This was done when the ...

In recent years, as offshore resources, not only fishery resources, including oil, natural gas, rare metals, and other minerals attract increasing attention, national surveys have been underway in the vast seas that surround Japan. IHI applied own robot technologies to take another step forward in achieving autonomous unmanned maritime systems for conducting detailed surveys at a water depth of...

BACKGROUND To reach the global goal of elimination of lymphatic filariasis as a public health problem by 2020, national programs will have to implement a series of transmission assessment surveys (TAS) to determine prevalence of the disease by evaluation unit. It is expected that 4,671 surveys will be required by 2020. Planning in advance for the costs associated with these surveys is essential...

UNLABELLED BACKGROUND Health Examination Surveys (HESs) can provide essential information on the health and health determinants of a population, which is not available from other data sources. Nevertheless, only some European countries have systems of national HESs. A study conducted in 2006-2008 concluded that it is feasible to organize national HESs using standardized measurement procedure...

Despite concerted research efforts, piglet morbidity and mortality remain as significant problems for the swine industry. This is well illustrated in statistics reported by the most recent National Swine Surveys conducted by the USDA National Animal Health Monitoring System (NAHMS, 1997, 2000). These surveys documented little if any improvement in piglet mortality rates (farrowing and nursery p...

Background The purpose of this review was to determine the most valid and reliable questions for targeting key modes of sedentary behaviour (SB) in a broad range of national and international health surveillance surveys. This was done by reviewing the SB modules currently used in population health surveys, as well as examining SB questionnaires that have performed well in psychometric testing. ...