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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...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2011
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3144452/ https://www.ncbi.nlm.nih.gov/pubmed/21703013 http://dx.doi.org/10.1186/1471-2288-11-99 |