Parameters | Expression Parameters | Additional Covariates

Additional Covariates
Use this text box to specify variables to use as additional effects beside the corresponding data values from the tall Input SAS Data Set in the model.
The (Cox) model fitting will be adjusted for these covariates.
To Specify One or More Covariates:
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To specify interactions between effect, type an asterisk (*) between the effects. For example, assuming A and B are listed as class variables, typing A B A*B specifies variables A and B, and the interaction between A and B as effects.
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A vertical bar (|) can be used to create main effects and interactions. For example, typing A|B is the same as typing A B A*B.
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