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Stratified sampling design and loss to follow-up in survival models: evaluation of efficiency and bias

BACKGROUND: Longitudinal studies often employ complex sample designs to optimize sample size, over-representing population groups of interest. The effect of sample design on parameter estimates is quite often ignored, particularly when fitting survival models. Another major problem in long-term coho...

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Bibliografiske detaljer
Main Authors: César, Cibele C, Carvalho, Marilia S
Format: Artigo
Sprog:Inglês
Udgivet: BioMed Central 2011
Fag:
Online adgang:https://ncbi.nlm.nih.gov/pmc/articles/PMC3144452/
https://ncbi.nlm.nih.gov/pubmed/21703013
https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1471-2288-11-99
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