# Genetic, Brain Structure, and Environmental Effects on ADHD

> **NCT01721720** · — · COMPLETED · sponsor: **National Human Genome Research Institute (NHGRI)** · enrollment: 1091 (actual)

## Conditions studied

- Attention Deficit Disorder With Hyperactivity

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT01721720
- **Lead sponsor:** National Human Genome Research Institute (NHGRI)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2012-11-09
- **Primary completion:** 2024-07-25
- **Final completion:** 2024-07-25
- **Target enrollment:** 1091 (ACTUAL)
- **Last updated:** 2024-10-16


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01721720

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01721720, "Genetic, Brain Structure, and Environmental Effects on ADHD". Retrieved via AI Analytics 2026-09-27 from https://api.ai-analytics.org/clinical/NCT01721720. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*