Statistical analysis with missing data
Statistical analysis with missing data
Interactive computer program for optimal designs of longitudinal cohort studies
Computer Methods and Programs in Biomedicine
PODSE: A computer program for optimal design of trials with discrete-time survival endpoints
Computer Methods and Programs in Biomedicine
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ODMixed is a computer program to obtain optimal designs for linear mixed models of longitudinal studies. These designs account for heterogeneous correlated errors and for data with dropout. Designs are compared by using relative efficiencies, e.g., between a D-optimal design for homogeneous data and another for heterogeneous data or between a D-optimal design for complete data against another that optimizes designs when data is missing at random. Two examples are worked out to illustrate how researchers could use this computer program to profit of optimal design theory at the planning stage of longitudinal studies.