Growth modeling with nonignorable dropout: alternative analyses of the STAR*D antidepressant trial.
Growth modeling with nonignorable dropout: alternative analyses of the STAR*D antidepressant trial.
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DOI:
10.1037/a0022634
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发表时间:
2011-03
影响因子:
7
通讯作者:
Leuchter, Andrew F.
中科院分区:
文献类型:
--
作者:
Muthen, Bengt;Asparouhov, Tihomir;Hunter, Aimee M.;Leuchter, Andrew F.
This paper uses a general latent variable framework to study a series of models for non-ignorable missingness due to dropout. Non-ignorable missing data modeling acknowledges that missingness may depend on not only covariates and observed outcomes at previous time points as with the standard missing at random (MAR) assumption, but also on latent variables such as values that would have been observed (missing outcomes), developmental trends (growth factors), and qualitatively different types of development (latent trajectory classes). These alternative predictors of missing data can be explored in a general latent variable framework using the Mplus program. A flexible new model uses an extended pattern-mixture approach where missingness is a function of latent dropout classes in combination with growth mixture modeling using latent trajectory classes. A new selection model allows not only an influence of the outcomes on missingness, but allows this influence to vary across latent trajectory classes. Recommendations are given for choosing models. The missing data models are applied to longitudinal data from STAR*D, the largest antidepressant clinical trial in the U.S. to date. Despite the importance of this trial, STAR*D growth model analyses using non-ignorable missing data techniques have not been explored until now. The STAR*D data are shown to feature distinct trajectory classes, including a low class corresponding to substantial improvement in depression, a minority class with a U-shaped curve corresponding to transient improvement, and a high class corresponding to no improvement. The analyses provide a new way to assess drug efficiency in the presence of dropout.
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DOI:
10.3102/10769986030001027
发表时间:
2005-03-01
影响因子:
2.4
作者:
Muthén, B;Masyn, K
通讯作者:
Masyn, K
影响因子:
1.9
作者:
Muthén, B;Shedden, K
通讯作者:
Shedden, K
DOI:
10.1016/s0197-2456(03)00112-0
发表时间:
2004-02-01
期刊:
CONTROLLED CLINICAL TRIALS
影响因子:
--
作者:
Rush, AJ;Fava, M;Niederehe, G
通讯作者:
Niederehe, G
影响因子:
4.8
作者:
Hunter, Aimee M.;Muthen, Bengt O.;Leuchter, Andrew F.
通讯作者:
Leuchter, Andrew F.
影响因子:
17.7
作者:
Trivedi, MH;Rush, AJ;Fava, M
通讯作者:
Fava, M