Table 4.

Evaluation of Strategies to Determine Children With BLL Specified*

StrategyPositive Predictive ValueNegative Predictive ValueSensitivity (95% Confidence Interval)Specificity
BLL ≥10 μg/dLBLL ≥15 μg/dLBLL ≥10 μg/dLBLL ≥15 μg/dLBLL ≥10 μg/dLBLL ≥15 μg/dLBLL ≥10 μg/dLBLL ≥15 μg/dL
Illinois strategy
 Ever lived in/regularly visited a house   built before 1960
 Renovation to house built before 1960
 Job/hobby
  Low-risk ZIP code43989975  (54–96)88  (65–100)3939
  High-risk ZIP code126889674  (59–89)80  (60–100)2728
Questions similar to 1997 CDC strategy
 Listed before 1950 as year house built
 Renovation to house built before 1960
  Low-risk ZIP code53989962  (38–86)62  (28–96)5857
  High-risk ZIP code156949782  (69–95)80  (60–100)3634
Alternate strategy
 Listed before 1950 as year house built
 Renovation to house built before 1960
 Peeling/chipping paint in house built   before 1960
 Job/hobby
  Low-risk ZIP code53999981  (62–100)88  (65–100)4747
  High-risk ZIP code146949888  (77–99)93  (80–100)2625
  • * Children with any “yes” or “don't know” or missing response were considered to need a blood lead test.