How much loss to follow-up is acceptable in long-term randomised trials and prospective studies?
نویسندگان
چکیده
منابع مشابه
How much loss to follow-up is acceptable in long-term randomised trials and prospective studies?
There is increasing evidence that health and development in adult life is influenced or ‘‘programmed’’ by factors, including nutrition, operating during foetal life and infancy. Early nutrition in a variety of animal species, including primates, has been demonstrated to influence later outcomes, including the likelihood of cardiovascular disease, learning and behaviour problems and longevity (s...
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BACKGROUND Loss of follow-up represents a potential source of bias. Suggested guidelines propose 20% loss of follow-up as acceptable. However, these guidelines have not been established through scientific investigations. The goal of this study was to evaluate how loss of follow-up influences the statistical significance in a trauma database. METHODS A database of 637 polytrauma patients with ...
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Introducing RCTM (Research-Centered Teaching Method) by the author showed the method provokes enthusiasm and anxiety, correlated with cognition: Cognition = (0.27) enthusiasm– (0.15) not interested + (0.08) anxiety. “The broaden-and-build theory” (Fredrickson, 2001) posits that positive emotions are useful in several ways. By linking this theory and emotional intelligence theory, it becomes app...
متن کاملThere is much scope for explorative learning and long-term memory in active teaching process
Introducing RCTM (Research-Centered Teaching Method) by the author showed the method provokes enthusiasm and anxiety, correlated with cognition: Cognition = (0.27) enthusiasm– (0.15) not interested + (0.08) anxiety. “The broaden-and-build theory” (Fredrickson, 2001) posits that positive emotions are useful in several ways. By linking this theory and emotional intelligence theory, it becomes app...
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In prospective studies, disease rates during follow-up are typically analyzed with respect to the values of factors measured during an initial baseline survey. However, because of "regression dilution," this generally tends to underestimate the real associations of disease rates with the "usual" levels of such risk factors during some particular exposure period. The "regression dilution ratio" ...
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ژورنال
عنوان ژورنال: Archives of Disease in Childhood
سال: 2008
ISSN: 0003-9888,1468-2044
DOI: 10.1136/adc.2007.127316