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CompletedNCT00014885Updated Mar 23, 2006

Bone Lead Levels and College Achievement Scores

An observational study in Lead Poisoning, sponsored by National Institute of Environmental Health Sciences (NIEHS). Completed. Open to participants aged 18 Years to 24 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2006-03-23.

Sponsored by National Institute of Environmental Health Sciences (NIEHS) · Observational

Study type
Observational
Time perspective
Retrospective
Enrollment
750
Ages
18 Years to 24 Years
Sex
All
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Study summary

This project studies the relationship between lead exposure and academic achievement in college students. Most studies of the neurobehavioral effects of lead have focused on performances at the low end of the distribution. There is evidence that lead affects outcome across the entire distribution. This is a retrospective cohort study of subjects whose cognitive function is adequate to gain admission to college. We will use x-ray fluorescence to measure bone lead concentrations in undergraduate college students and test the hypothesis that achievement scores are related to early lead exposure. Early lead exposure has been shown to have measurable effects on academic performance and neurobehavioral outcomes at 18 years of age. Should an effect be found in this study, the spectrum of lead toxicity would be expanded to include subjects with above average function.

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Conditions studied

  • Lead Poisoning

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Keywords

  • Lead exposure
  • Bone lead
  • Cognitive function
  • Academic achievement
  • Neurobehavior
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In context

Lead Poisoning

27 studies on the registry are indexed under Lead Poisoning; 2 are open to participants now.

This study's enrollment of 750 is above the median of 350 across 14 observational studies indexed under Lead Poisoning.

Browse Lead Poisoning studies →

Lead sponsor

National Institute of Environmental Health Sciences (NIEHS) is the lead sponsor of 183 studies on the registry; 18 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 24 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Eligibility criteria

Current undergraduate student at the University of Pittsburgh who have taken the Scholastic Aptitude Test (SAT).

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Study design

Time perspective
Retrospective
Enrollment
750 participants
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Study locations

No study locations are listed for this record.

07

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Sep 1998 and a completion of Aug 2001. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 12, 2001
First posted
Apr 13, 2001
Start
Sep 1998
Completion
Aug 2001
Last update
Mar 23, 2006
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
No changes since tracking began. The registry record was last updated on Mar 23, 2006, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00014885
First posted
Apr 13, 2001
Start date
Sep 1998
Completion
Aug 2001
Last update
Mar 23, 2006
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2006. You cannot join it, but the record below documents what was studied.

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