TABLE 2.

Baseline Characteristics of Enrolled Children Followed to Seven Years of Age According to Treatment Group

CharacteristicPlacebo Group (N = 322; Mean [SD])Succimer Group (N = 325; Mean [SD])
Age, mo25 (5)25 (6)
Blood lead level, μg/dL26 (5)27 (5)
Weight, kg12.4 (1.9)12.3 (2.0)
Body surface area (m2)0.50 (0.1)0.50 (0.1)
Reported birth weight3171 (624)3140 (552)
Bayley Scales of Infant Development
 Mental Development Index82 (13)84 (13)
 Psychomotor Development Index§92 (13)93 (14)
Caregiver's IQ79 (11)81 (11)
Female44%47%
Ethnicity
 Hispanic8%6%
 Black75%79%
Single parent71%71%
Parent with less than a high school education40%39%
At least 1 employed parent44%40%
Annual family income
 <$10 00038%38%
 ≥$10 00026%28%
 Unknown37%35%
Parent on public assistance96%95%
  • * Convert to μmol/L ([μg/dL] × 0.04826).

  • These data were available for 302 children in the placebo group and 311 children in the succimer group.

  • These data were available for 313 children in the placebo group and 320 children in the succimer group.

  • § These data were available for 275 children in the placebo group and 283 children in the succimer group.

  • These data were available for 318 children in the placebo group and 315 children in the succimer group.