Sample Design Information

This table contains information on the sample design pertinent to the estimation of the model.
- There is one case per subject, and all 5,687 cases are used in the analysis.
- The sample represents less than 2% of the entire estimated population.
- The design requested 4 strata and 5 units per strata for a total of 20 units in the first stage of the design. The sampling design degrees of freedom are estimated by 20−4=16.