Description
Results will be most accurate when there are at least 10 uncensored records for each explanatory variable. Uncensored records (meaning that the event has occurred for the observation) are indicated by the value 1 in the Event Indicator Field parameter value.
Note:
Each categorical explanatory variable is counted as a single explanatory variable for this warning. However, categorical explanatory variables are converted to a series of indicator variables that are used as explanatory variables in the model. If any categorical variables have many categories, more uncensored observations are recommended.
Solution
No action is required. However, the results may be inaccurate or unstable if there are few uncensored observations relative to the number of explanatory variables.