Analyzing Multiply-Imputed Data Sets

After you have performed a Multiple Imputation on your data set, you will have M complete data sets, each of which can be analyzed using standard complete-data statistical methods.

If you select Descriptive Statistics, Regression, t-test, Frequency Table from the Analyze menu of any data page, the analysis will be performed on all 5 data sets. The analysis generates 5 pages of output, one corresponding to each of the imputed data sets, and a Combined page that gives the overall set of results. The tabs at the bottom of the page allow you to display each data set.

This example uses the imputation results from the data set MI_TRIAL.MDD that was used in the Propensity Score example earlier. Part of data page 1 for that example is shown on the right.

1. From the data page Analyze menu select t- and Nonparametric Tests to display the Specify t-test Analysis window.
2. Drag and drop the variables MeasA_1 and MeasA_2 to the Variable 1 and Variable 2 datafields respectively.
3. Press the OK button to display the data pages, then press the Combine tab to display the combined statistics from the five imputed data pages as shown below.

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