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NCT02346188 · ClinicalTrials.gov registry record · NA
Effects of Iron and/or Zinc Supplementation in Mexican School Children Exposed to Lead
A NA study, sponsored by Johns Hopkins Bloomberg School of Public Health.
- Completed
- Registry status
- NA
- Development phase
- 602
- Enrollment target
NCT02346188: Completed NA study, sponsored by Johns Hopkins Bloomberg School of Public Health.
NCT02346188 is a NA study that has completed, run by Johns Hopkins Bloomberg School of Public Health. The registered enrollment target is 602 participants, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (57% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT02346188, a NA study, has completed, sponsored by Johns Hopkins Bloomberg School of Public Health.
- COMPLETED
- Registry status
- NA
- Development phase
- 602 participants
- Enrollment target
Study Summary
Lead is negatively linked to nutritional status, behavior and cognition in children. Despite extensive knowledge of its toxicity and efforts to reduce exposure, lead continues to be a problem in developed and developing countries. When lead exposure is unavoidable due to its pervasive nature, effective means of protecting or disrupting that exposure need to be developed. Nutritional interventions are one such option. We conducted a 2x2 factorial, placebo-controlled trial of 6-month iron and zinc supplementation among lead-exposed children in Torreón, Mexico (altitude 1060 m). Nine schools were selected based on proximity to a lead smelter and first-graders were individually randomized to daily treatment with 30 mg iron, 30 mg zinc, both, or placebo. In addition to biochemical indicators, cognitive functions and behavior were evaluated at baseline, after the 6-month supplementation period, and again after another 6 months (without supplementation). At baseline, 602 children ages 6.2-8.5 years were enrolled.
Interventions
- DIETARY_SUPPLEMENT Placebo
- DIETARY_SUPPLEMENT Ferrous fumarate
- DIETARY_SUPPLEMENT Zinc oxide
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 602 participants |
| Start Date | 2000-01 |
| Est. Completion | 2001-12 |
| Phase | NA |
What the finished NCT02346188 record still lists
NCT02346188 is an interventional study that assigns participants to a tested intervention. The registered 602 participants enrollment target is mid-sized for trials with a published cap, below the 1,404-participant average among 58,714 other NA trials with a reported enrollment target (57% lower).
The record links to 0 conditions, and to 3 interventions - of which Placebo is the first listed.
NCT02346188 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT02346188 about?
NCT02346188 is a clinical study titled "Effects of Iron and/or Zinc Supplementation in Mexican School Children Exposed to Lead". Lead is negatively linked to nutritional status, behavior and cognition in children. Despite extensive knowledge of its toxicity and efforts to reduce exposure, lead continues to be a problem in developed and developing countries. When lead exposure is unavoidable due to its pervasive nature, effect...
What is the current status of trial NCT02346188?
This trial is currently completed. It is a NA study. The enrollment target is 602 participants. The study started on 2000-01. Estimated completion is 2001-12.
What interventions are being tested in trial NCT02346188?
The interventions under investigation include: Placebo (DIETARY_SUPPLEMENT), Ferrous fumarate (DIETARY_SUPPLEMENT), Zinc oxide (DIETARY_SUPPLEMENT).
Who is sponsoring clinical trial NCT02346188?
This trial is sponsored by Johns Hopkins Bloomberg School of Public Health, which has 187 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT02346188's enrollment target sits among peer trials
602 162nd of 2000 higher than 1,839 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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