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When I fit mixture cure model with different parametric distributions G(t), the cure fraction estimates are quite different. Why?

April 26, 2017cure different distributions fit fraction mixture model Parametric t

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When I fit mixture cure model with different parametric distributions G(t), the cure fraction estimates are quite different. Why?

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While all of the parametric models fit the data approximately the same in the observed range of data, they may produce different cure fraction estimates for some cancer sites. Relatively long follow-up is required to obtain an accurate cure fraction estimate. For more details, please see Yu B. et al. (2004).