Pattern Mixture

Quick Summary

The macro imputes under a series of different methods, analyses data using Repeated measures (not ANOVA at a single visit) and provides summary estimates for least-squares means.

Either complete case missing value restriction (CCMV) or nearest case missing value (NCMV)restriction. [subset cases]
. . . and either non-future dependence (NFMV) or use all future data (ALL), when estimating parameters for each imputation step. [subset visits]

See Thijs & Molenberghs et al (2002), Strategies to fit Pattern Mixture Models, Biostatistics.3,2, 234-265.

Limitations

Similar models can be fitted using the MNAR statement in proc MI (SAS version 9.4 or later). Neither include ACMV.

Download

The files can be downloaded at Pattern Mixture Model_20120726

Includes useful set of Powerpoint slides.

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