Table 1.

Differences in the Distribution of Selected Census Tract Characteristics Within the Derivation Sample by Lead Risk Status*

Census Tract CharacteristicsLow Risk
n = 234
High Risk
n = 218
P Value
% housing built before 195038.070.3.000
% housing units renter-occupied40.456.2.000
% residents with <high school education26.241.9.000
% residents with income to poverty level ratio <1.5023.646.1.000
% female head of house with children <6 y old8.316.8.000
% residents <6 y old9.310.7.000
% male residents47.246.9.349
% male residents <6 y old4.85.3.001
% residents of black, non-Hispanic ethnicity19.548.0.000
% rural
  • * Census tracts in which ≥12% of BPb levels obtained in residents were ≥10 μg/dL were considered high-risk areas for lead exposure and poisoning in children.

  • The number of individuals living in a rural area (using farm and nonfarm area designations from the 1990 US Census) divided by the total number of persons living in the census tract.