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227
Complex Samples Cox Regression
Preparing the Data for Analysis
Before restructuring the data, you will need to create two ancillary variables to help with the
restructuring.
E To compute a new variable, from the menus choose:
Transform > Compute Variable...
Figure 22-21
Compute Variable dialog box
E Type start_time2 as the target variable.
E Type time1 as the numeric expression.
E Click OK.