Semi Parametric Models
Mostrando 13-13 de 13 artigos, teses e dissertações.
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13. Prevalent cases in observational studies of cancer survival: do they bias hazard ratio estimates?
Observational epidemiological studies often include prevalent cases recruited at various times past diagnosis. This left truncation can be dealt with in non-parametric (Kaplan–Meier) and semi-parametric (Cox) time-to-event analyses, theoretically generating an unbiased hazard ratio (HR) when the proportional hazards (PH) assumption holds. However, concern
Nature Publishing Group.