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To compare the results (qualitative and quantitative) and costs of 2 surveys using the same questionnaire, one sent by mail and the other administered by telephone.
Where serial surveys using the same methodology were available, data prior to 2000 was included to establish physical activity trends.
Temporal comparisons with previous French surveys using the same methodology, however, should not be affected by this potential bias, which was common to all previous surveys.
Wide variations in levels and trends in self-rated health measured in nationally representative surveys using the same survey item demand an explanation.
Child health information was collected in the 2003 and 2010 surveys using the same standardized SIDRIA Italian Studiess on Respiratory Disorders in Children and the Environment) questionnaire [ 12, 13] compiled by the parents.
Among those who reported in at least two web surveys using the same type of pesticides, 18 out of the 41 participants reported that they were the person who applied outdoor sprays; 6 out of the 16 participants applied indoor sprays themselves.
Similar(54)
It is not clear, though, whether the Chinese surveys use the same definitions of obesity as in the U.S. or elsewhere.
Two previous epidemiological surveys used the same screening question for migraine as in the present study, and the observed agreement rates were 0.92 and 0.94, and κ were 0.77 and 0.81, respectively [2, 40].
The surveys used the same sampling methods.
All surveys used the same questionnaire.
Both the 2007 and 2010 surveys used the same instruments and methodology but sampled different households.
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