Table 1.
Preliminary Data Analysis
| Variable | Mean | SD |
|---|---|---|
| Incidence of mumps (no. of cases per year in state) | 329 | 1,183 |
| Incidence of pertussis (no. of cases per year in state) | 392 | 1,630 |
| Incidence of rubella (no. of cases per year in state) | 197 | 632 |
| White birth count | 58,730 | 68,757 |
| Black birth count | 11,449 | 13,629 |
| Population (in thousands) | 9,804 | 33,822 |
| Total state expenditure (in USD thousands) | 21,000,000 | 100,000,000 |
| Medicaid spending (in USD millions) | 5,569 | 24,428 |
| State health direct (nonhospital) expenditure (in USD thousands) | 593,011 | 2,700,000 |
| Hospital direct expenditure (in USD thousands) | 888,662 | 3,700,000 |
The number of states in the study exceeds the total number of states in the United States because the data used for this analysis include U.S. islands and territories and some states in the data have been divided into regions. For the final analysis, only the 50 states and Washington DC were included.