Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT00339729 · ClinicalTrials.gov registry record
Johnston County ADHD Study: Environmental, Reporductive, and Familial Risk Factors for Attention-Deficit Hyperactivity Disorder (ADHD)
A clinical trial, sponsored by National Institute of Environmental Health Sciences (NIEHS).
- Completed
- Registry status
- 8,000
- Enrollment target
NCT00339729: Completed study, sponsored by National Institute of Environmental Health Sciences (NIEHS).
NCT00339729 is a clinical trial that has completed, run by National Institute of Environmental Health Sciences (NIEHS). The registered enrollment target is 8,000 participants. According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00339729 has completed, sponsored by National Institute of Environmental Health Sciences (NIEHS).
- COMPLETED
- Registry status
- 8,000 participants
- Enrollment target
Study Summary
We propose a population-based case-control study among 7000 elementary school children in semi-rural Johnston County, NC. Teachers will complete a screening form on each child. Controls will be randomly selected. Mothers of potential cases and controls will be interviewed by telephone about their child's symptoms of ADHD and exposure history, their family history of ADHD, and their reproductive and exposure history. Children's shed baby teeth will be analyzed for lead. Mothers will complete brief parenting scales and the Child Behavior Checklist. School records will be collected. The study goals are to identify risk factors for ADHD including preterm delivery and childhood lead exposure.
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 8,000 participants |
| Start Date | 1997-05-07 |
| Est. Completion | 2007-05-24 |
What the finished NCT00339729 record still lists
NCT00339729 is an observational study that tracks outcomes without assigning an intervention. Its 8,000 participants enrollment target places it among the larger protocols in the corpus.
The record links to 0 conditions, and to 0 interventions.
NCT00339729 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00339729 about?
NCT00339729 is a clinical study titled "Johnston County ADHD Study: Environmental, Reporductive, and Familial Risk Factors for Attention-Deficit Hyperactivity Disorder (ADHD)". We propose a population-based case-control study among 7000 elementary school children in semi-rural Johnston County, NC. Teachers will complete a screening form on each child. Controls will be randomly selected. Mothers of potential cases and controls will be interviewed by telephone about their ch...
What is the current status of trial NCT00339729?
This trial is currently completed. The enrollment target is 8,000 participants. The study started on 1997-05-07. Estimated completion is 2007-05-24.
Who is sponsoring clinical trial NCT00339729?
This trial is sponsored by National Institute of Environmental Health Sciences (NIEHS), which has 145 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT00539162 · 8,000 participants · NA
Use of the CA 125 Algorithm for the Early Detection of Ovarian Cancer in Low Risk Women
- NCT00898638 · 8,000 participants
Tissue Sample Collection From Patients With Head and Neck Cancer and From Healthy Participants
- NCT02240862 · 8,000 participants
The CREST-2 Registry
- NCT03072927 · 8,000 participants
MILD® Percutaneous Image-Guided Lumbar Decompression: A Medicare Claims Study
Similar registry start date
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia
- NCT07125183 · started 2026-12 · Phase 2
Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma
- NCT07292298 · started 2026-11 · Phase 2
Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates
- NCT04263285 · started 2026-10 · NA
Treatment of Depression Post-SCI