Results 341 to 350 of about 6,049,734 (391)
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1991
Abstract In a cross-sectional study the occurrence (prevalence) of the disease under study for the ‘exposed’ is compared with the same occurrence in the non-exposed. The exposure and disease status is examined for the same time period. We do not have data to establish exposure status before the onset of the disease.
Jørn Olsen +3 more
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Abstract In a cross-sectional study the occurrence (prevalence) of the disease under study for the ‘exposed’ is compared with the same occurrence in the non-exposed. The exposure and disease status is examined for the same time period. We do not have data to establish exposure status before the onset of the disease.
Jørn Olsen +3 more
openaire +1 more source
BMJ, 2010
Researchers investigated public perception, anxiety, and behaviour with regard to the outbreak of swine flu.1 A cross sectional survey was used, with random dialling of telephone numbers in England, Scotland, and Wales. In total, 997 adults aged over 18 years—who had heard of swine flu and spoke English—were interviewed between 8 May and 12 May 2009 ...
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Researchers investigated public perception, anxiety, and behaviour with regard to the outbreak of swine flu.1 A cross sectional survey was used, with random dialling of telephone numbers in England, Scotland, and Wales. In total, 997 adults aged over 18 years—who had heard of swine flu and spoke English—were interviewed between 8 May and 12 May 2009 ...
openaire +1 more source
1988
In cohort studies, subjects are followed in a forward direction from exposure to outcome, and inferential reasoning is from cause to effect. In case-control studies, subjects are investigated in a backward direction from outcome to exposure; inference is from effect to cause.
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In cohort studies, subjects are followed in a forward direction from exposure to outcome, and inferential reasoning is from cause to effect. In case-control studies, subjects are investigated in a backward direction from outcome to exposure; inference is from effect to cause.
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2010
In a cross-sectional study, all in a given population or a random sample from this population define the source population. The disease and its possible determinants are all recorded at a given point in time. This introduces a temporal ambiguity in the possible cause–effect association and for this reason most cross-sectional studies have survey ...
Jørn Olsen +3 more
openaire +1 more source
In a cross-sectional study, all in a given population or a random sample from this population define the source population. The disease and its possible determinants are all recorded at a given point in time. This introduces a temporal ambiguity in the possible cause–effect association and for this reason most cross-sectional studies have survey ...
Jørn Olsen +3 more
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Systemic inflammation markers and the prevalence of hypertension: A NHANES cross-sectional study
Hypertension Research, 2023Junpeng Xu +8 more
semanticscholar +1 more source
2011
Cross-sectional studies are related to sample surveys. In both types of studies a sample S is taken from the target population U, for example by one of the sampling plans presented in Sect. 12.2. The basic difference between the two studies resides in their purpose and, consequently, in the way they are being evaluated. As remarked in Sect.
Klaus Krickeberg +2 more
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Cross-sectional studies are related to sample surveys. In both types of studies a sample S is taken from the target population U, for example by one of the sampling plans presented in Sect. 12.2. The basic difference between the two studies resides in their purpose and, consequently, in the way they are being evaluated. As remarked in Sect.
Klaus Krickeberg +2 more
openaire +1 more source
Prevalence of depressive disorders and treatment in China: a cross-sectional epidemiological study.
Lancet psychiatry, 2021Jin Lu +38 more
semanticscholar +1 more source