TABLE 2

Baseline Association Between Cognitive Performance and Lead for 594 Children

TaskaMean (SD)RangeβbPb
General Abilities and Learning
    PPVT Standard score103.2 ± 15.655–145−.56<.01
    MAT Final score31.3 ± 7.53–52−.22<.01
    Freedom From Distractibility factor94.4 ± 15.952–133−.33<.01
Attention and Memory
    Sternberg Memory12.1 ± 2.94–20−.05<.01
    Figure Matching24.7 ± 3.78–32−.07<.01
    Stimulus Discrimination17.6 ± 3.80–20−.04.14
    Cognitive Abilities Test, Stimulus Discrimination mean     decision time6.0 ± 1.73.0–16.3.02.14
    Visual Memory Span6.5 ± 3.52–24−.05.034
Visual-spatial abilities
    Visual Search19.1 ± 7.30–37−.07.13
    Sequencing7.3 ± 4.20–26−.09<.01
    Figure Design, final score19.7 ± 6.02–40−.06.13
  • PPVT indicates Peabody Picture Vocabulary Test; MAT, Math Achievement Test.

  • a Unless specified, number correct was the measure of interest and was used in regression analysis.

  • b Unstandardized β coefficient from an unadjusted bivariate regression model; lead entered as a continuous variable.