The report compared the most recently-published health surveys in the four UK countries.
The study was based on nationally representative health surveys that included in-person interviews with nearly 120, 000 children across the country.
Both Samoa's obesity ranking, and the finding that it may be overstated, have been made possible by a series of new health surveys in Samoa and its island-nation neighbors.
Dr Boerma reviewed the results of population-based general-health surveys similar to Kenya's that were carried out in Zambia and Mali, and also a study based on saliva samples that was carried out in South Africa.
Researchers used data from the National Health and Nutrition Examination Surveys from 1999 to 2004.
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Jaime Gahche, main author of the CDC report, and her co-authors analyzed responses from a sample size of 37, 596, using National Health and Nutrition Examination surveys.
National statistics on smoking are provided by two federal surveys, the National Health Interview Survey (NHIS) and the National Survey on Drug Use and Health (NSDUH).
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The study was conducted by the National Center for Health Statistics, which as part of the Centers for Disease Control and Prevention regularly uses telephone surveys as a source of information about public health trends.
While there is no universally accepted minimum response rate for publication of surveys in social science and health research, the American Association for Public Opinion Research asked journals about this issue and found that 60-80% response range is acceptable, while one journal said that below 20% is just too low.
While recent surveys suggest an increase in the health of the Maori language, Te Taura Whiri i te reo Maori chairman, Erima Henare recently warned against complacency.
The number of Americans with allergies is two to five times higher now than it was about 30 years ago, according to surveys from the National Institutes of Health.
Within those categories, there are more than 100 sub-criteria, like degree of confinement in the work environment and income growth potential. (My colleague Jacquelyn Smith covered the last best and worst lists here.) The data come from the BLS, the Census Bureau, the Occupational Safety and Health Administration, and an array of private compensation surveys, trade association studies and state statistics.
This is not easy: when the American state of Oregon tried using opinion surveys to help set the priorities of its health service, it reached the bizarre conclusion that cosmetic breast-enlargement was more important than treating broken legs.
It processed 70 million patient surveys last year from 10, 000-plus health care organizations and half of all U.S. hospitals.
They run surveys designed to coax people to describe their lifestyles and health conditions.
People who take over new allotments in the Highlands will be asked to complete surveys designed to assess how the gardens benefit their mental health.
For example, surveys discussed indicated that the public believes there is a very high rate of mental health issues for those who have deployed.
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Recent surveys reveal that 67 percent of employers with three or more employees and who offered health insurance had at least one wellness program in place.
Numerous surveys show the benefits of physical and organized sport activity for students, both for their health and for improving their academic performance.
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The researchers took advantage of data from the long-term Nurses' Health Study, which has enrolled more than 230, 000 female registered nurses since 1976 and which surveys them every two years.
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To complement these ground-based measurements, which can focus on only a limited area, the team will conduct aerial surveys once a year at each core site, looking at things like leaf chemistry and the health of forest canopies, and will also look down on them with satellites.
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Its figures for the UK were based on data from England, although surveys suggest the percentage of obese adults in Wales and Northern Ireland is similar and Scotland's latest health report put the figure at 28%.
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