A linear mixed model for predicting a binary event from longitudinal data under random effects misspecification.
A linear mixed model for predicting a binary event from longitudinal data under random effects misspecification.
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DOI:
10.1002/sim.4405
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发表时间:
2012-01-30
影响因子:
2
通讯作者:
Albert, Paul S.
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文献类型:
--
作者:
Albert, Paul S.
The use of longitudinal data for predicting a subsequent binary event is often the focus of diagnostic studies. This is particularly important in obstetrics, where ultrasound measurements taken during fetal development may be useful for predicting various poor pregnancy outcomes. We propose a modeling framework for predicting a binary event from longitudinal measurements where a shared random effect links the two processes together. Under a Gaussian random effects assumption, the approach is simple to implement with standard statistical software. Using asymptotic and simulation results, we show that estimates of predictive accuracy under a Gaussian random effects distribution are robust to severe misspecification of this distribution. However, under some circumstances, estimates of individual risk may be sensitive to severe random effects misspecification. We illustrate the methodology with data from a longitudinal fetal growth study.
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