Table 1. Comparisons of the Incidence Risk of La Crosse Virus Infections for At-Risk Population Groups at the County and Census Tract Levels in eastern Tennessee, 1997–2006.
Incidence Risk per 100,000 persons | ||||||
County Level | Census Tract Level | |||||
Population Groups | n* | Median | Range | n* | Median | Range |
Total population (All areas) | 18 | 7.6 | 0.0–46.9 | 230 | 0.0 | 0.0–133.3 |
Total population (Only areas reporting cases) | 14 | 8.8 | 0.9–46.9 | 55 | 27.7 | 11.9–133.3 |
Population 18 years and younger (All areas) | 18 | 26.3 | 0.0–188.4 | 230 | 0.0 | 0.0–547.1 |
Population 18 years and younger (Only areas reporting cases) | 14 | 35.0 | 3.9–188.4 | 52 | 114.6 | 44.3–547.1 |
Population 15 years and younger (All areas) | 18 | 31.4 | 0.0–226.4 | 230 | 0.0 | 0.0–673.9 |
Population 15 years and younger (Only areas reporting cases) | 14 | 41.5 | 4.67–226.4 | 51 | 126.7 | 50.9–673.9 |
Number of counties or census tracts used for each specific analysis.