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pro vyhledávání: '"S. Claiborne Johnston"'
Autor:
Jane A. Cauley, Jacob S. Elkins, Elad Ziv, Deborah M. Kado, S. Claiborne Johnston, Kristine Yaffe
Publikováno v:
American Journal of Epidemiology. 166:672-678
Homocysteine may play a causal role in cognitive decline. The authors analyzed the 5,10-methylenetetrahydrofolate reductase (MTHFR) C677T genotype, a correlate of plasma homocysteine levels, among 6,653 participants in the Study of Osteoporotic Fract
Publikováno v:
American Journal of Epidemiology. 156:753-760
During evaluation of treatment effects in observational studies, confounding is a constant threat because it is always possible that patients with a better prognosis, not adequately characterized by measured covariates, are chosen for a specific ther
Autor:
S. Claiborne Johnston
Publikováno v:
American Journal of Epidemiology. 154:276-284
Confounding by indication is a relentless threat to validity in observational studies of treatment effects. Multivariable models allow adjustment for known and readily measurable prognostic factors, but they may incompletely or inaccurately represent
Autor:
Michael T. Lawton, Helen Kim, William L. Young, Charles E. McCulloch, Stephen Sidney, S. Claiborne Johnston
Publikováno v:
American journal of epidemiology. 171(12)
We have with great interest read the article, ‘‘Comparison of 2 Approaches for Determining the Natural History Risk of Brain Arteriovenous Malformation Rupture,’’ by Kim et al. (1), published in the June 15, 2010, issue of the American Journa
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Autor:
Jacob S. Elkins, S. Claiborne Johnston, Elad Ziv, Deborah Kado, Jane A. Cauley, Kristine Yaffe
Publikováno v:
American Journal of Epidemiology; Sep2007, Vol. 166 Issue 6, p672-672, 1p