Results 341 to 350 of about 44,936,151 (395)
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Cross calibration in longitudinal studies

Statistics in Medicine, 2004
AbstractIn a long‐running longitudinal study using complex machinery to obtain measurements, it is sometimes necessary to replace the machine. This can result in lack of continuity in the measurements that can overwhelm any treatment effect or time trend.
Siu L. Hui, Walter T. Ambrosius
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The Consortium for Longitudinal Studies

Educational Evaluation and Policy Analysis, 1981
The Consortium for Longitudinal Studies is a cooperative effort of over a dozen investigators endeavoring to assess the long-term effects of early education on the lives of children from low-income families. The principal investigators, who conducted 14 longitudinal research and demonstration projects in the 1960s, agreed to pool their original data ...
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A new method of classifying prognostic comorbidity in longitudinal studies: development and validation.

Journal of Chronic Diseases, 1987
M. Charlson   +3 more
semanticscholar   +1 more source

Longitudinal Studies 1: Determination of Risk

2008
Longitudinal and observational study designs are important methodologies to investigate potential associations that may not be amenable to RCTs. In many cases, they may be performed using existing data and are often cost-effective ways of addressing important questions. The major disadvantage of observational studies is the potential for bias.
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Benchmarking: a longitudinal study

Baltic Journal of Management, 2012
PurposeThe purpose of this paper is to examine the use and effect of benchmarking in manufacturing companies.Design/methodology/approachA total of 23 companies were interviewed longitudinally in 1993, 2004 and 2010. For the study a standard questionnaire was used, and the questions asked concerned the best practices used in the companies and their ...
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Overweight, obesity, and depression: a systematic review and meta-analysis of longitudinal studies.

Archives of General Psychiatry, 2010
F. Luppino   +6 more
semanticscholar   +1 more source

Conducting longitudinal studies

New Directions for Institutional Research, 2004
AbstractAlthough time and resource intensive, longitudinal studies offer the ability to examine the direction and magnitude of causal relationships that cannot be accomplished through cross‐sectional design.
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A Case for a Longitudinal Study

1994
Recently, Michael Gottfredson and Travis Hirschi have dismissed longitudinal studies in criminology as pointless and unduly expensive. They state their case in quite general terms but have a narrow and unusual definition of longitudinal studies.
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