SPSS Categories® 11.0

22 Chapter 2
Categorical Regression Missing Values
The Missing Values dialog box allows you to choose the strategy for handling missing
values in analysis variables and supplementary variables.
Figure 2.4 Categorical Regression Missing Values dialog box
Strategy. Choose to impute missing values (active treatment) or exclude objects with
missing values (listwise deletion).
Impute missing values. Objects with missing values on the selected variable have
those values imputed. You can choose the method of imputation. Select Mode to replace
missing values with the most frequent category. When there are multiple
modes, the one with the smallest category indicator is used. Select Extra category to
replace missing values with the same quantification of an extra category. This implies
that objects with a missing value on this variable are considered to belong to the
same (extra) category.
Exclude objects with missing values on this variable. Objects with missing values
on the selected variable are excluded from the analysis. This strategy is not available
for supplementary variables.