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Variables with time-varying effects and the Cox model: Some statistical concepts illustrated with a prognostic factor study in breast cancer
BACKGROUND: The Cox model relies on the proportional hazards (PH) assumption, implying that the factors investigated have a constant impact on the hazard - or risk - over time. We emphasize the importance of this assumption and the misleading conclusions that can be inferred if it is violated; this...
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| Main Authors: | , , , , , |
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| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
BioMed Central
2010
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| Assuntos: | |
| Acesso em linha: | https://ncbi.nlm.nih.gov/pmc/articles/PMC2846954/ https://ncbi.nlm.nih.gov/pubmed/20233435 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/1471-2288-10-20 |
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