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CompletedNCT01883817Updated Mar 16, 2022Results posted

Effect of Omega-3 Fatty Acid on Cortical Function in ADHD

A Phase 3 interventional study of DHA Omega-3 and Placebo in Attention Deficit Disorder, sponsored by University of Cincinnati. Completed at 1 site in United States. Open to participants aged 5 Years to 15 Years. Per ClinicalTrials.gov, last updated 2022-03-16.

Sponsored by University of Cincinnati · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
5 Years to 15 Years
Sex
All
01

Study summary

The study hypothesis is that DHA is more effective than placebo in increasing brain activation and reducing symptoms in psychostimulant-free children with ADHD.

Read the detailed description

This study aims to determine the effects of 10-week dietary supplementation with the long-chain omega-3 fatty acid docosahexaenoic acid (DHA) or placebo on prefrontal cortical structural and functional connectivity using several neuroimaging techniques: DTI (Diffusion Tensor Imaging), 1H MRS(Proton Magnetic Resonance Spectroscopy), and fMRI (Functional Magnetic Resonance Imaging) in psychostimulant-free children with attention deficit hyperactivity disorder (ADHD). It is postulated that DHA supplements will increase brain activation and reduce ADHD symptomatology.

02

Conditions studied

  • Attention Deficit Disorder

Keywords

  • ADHD
03

In context

Attention Deficit Disorder with Hyperactivity

1,514 studies on the registry are indexed under Attention Deficit Disorder with Hyperactivity; 255 are open to participants now.

This study's enrollment of 30 is below the median of 72 across 1,207 interventional studies indexed under Attention Deficit Disorder with Hyperactivity.

Browse Attention Deficit Disorder with Hyperactivity studies →

Lead sponsor

University of Cincinnati is the lead sponsor of 314 studies on the registry; 43 are open to participants now.

Of its 22 completed or terminated interventional studies of FDA-regulated products, 15 (68%) have results posted.

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

04

Who can participate

Ages eligible
5 Years to 15 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Provision of written informed consent/assent
  • Ages 5-15 years old
  • Meets DSM-IV-TR criteria for ADHD as determined by the KSADS

Exclusion criteria

Exclusion Criteria:

  • Contraindication to an MRI scan (i.e., braces, claustrophobia)
  • A history of a major medical (e.g., diabetes) or neurological illness (e.g., epilepsy)
  • Greater than 1 year outside appropriate age/grade level
  • A history of intolerance or hypersensitivity to omega-3 fatty acids
  • Currently taking omega-3 supplements
  • Not proficient in English language
  • Any history of a hematological disorder or concomitant use of anticoagulant medications
  • Personal history of an Axis I psychiatric disorder other than ADHD
  • Inability to swallow capsules
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
30 participants (actual)

Study arms

  • Placebo comparator
    Placebo

    Corn/soy oil placebo capsules that are similar in shape and color to the DHA capsules given over 10 weeks

    Drug: Placebo

  • Experimental
    DHA Omega-3

    Long-chain omega-3 fatty acid docosahexaenoic acid (DHA) at 1,200 mg/day, 600 mg twice daily for 10 weeks

    Drug: DHA Omega-3

Interventions

  • DrugDHA Omega-3

    Patients will receive a fixed dose of DHA (1,200 mg/day, 600 mg twice daily) or placebo (corn/soy oil) over 10 weeks

    Also known as: Docosahexaenoic acid, Omega 3 Fatty Acids

  • DrugPlacebo

    corn/soy oil capsule with similar color, taste, and shape as experimental drug (DHA)

    Also known as: Inactive drug

06

What researchers measure

Primary outcomes

  1. Attention-Deficit Hyperactivity Disorder Symptom Ratings Using the ADHD Rating Scale (ADHD-RS-IV)

    Attention-Deficit Hyperactivity Disorder Rating Scale Version IV (ADHD-RS-IV) Min score: 0 Max score: 54 Higher score = more severe ADHD symptoms

    Time frame: 10 weeks

07

Results

Posted Mar 16, 2022

Participant flow

Participant flow — Overall Study
MilestonePlaceboDHA Omega-3
Started1416
Completed109
Not completed47

Outcome measures

PrimaryAttention-Deficit Hyperactivity Disorder Symptom Ratings Using the ADHD Rating Scale (ADHD-RS-IV)

Attention-Deficit Hyperactivity Disorder Rating Scale Version IV (ADHD-RS-IV) Min score: 0 Max score: 54 Higher score = more severe ADHD symptoms

Time frame:
10 weeks
Reported as:
Mean · score on a scale
Attention-Deficit Hyperactivity Disorder Symptom Ratings Using the ADHD Rating Scale (ADHD-RS-IV)
score on a scalePlaceboDHA Omega-3
Attention-Deficit Hyperactivity Disorder Symptom Ratings Using the ADHD Rating Scale (ADHD-RS-IV)47.1 ± 8.546.1 ± 6.6

Adverse events

Collected over 12 weeks. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Placebo0/14 (0%)0/14 (0%)0/14 (0%)
DHA Omega-30/16 (0%)0/16 (0%)0/16 (0%)

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)PlaceboDHA Omega-3Total
<=18 years141630
Between 18 and 65 years000
>=65 years000
Sex: Female, Male
Sex: Female, Male(Participants)PlaceboDHA Omega-3Total
Female347
Male111223
Race (NIH/OMB)
Race (NIH/OMB)(Participants)PlaceboDHA Omega-3Total
American Indian or Alaska Native000
Asian000
Native Hawaiian or Other Pacific Islander000
Black or African American459
White7916
More than one race325
Unknown or Not Reported000
Region of Enrollment
Region of Enrollment(participants)PlaceboDHA Omega-3Total
United States141630
08

Study locations

1 site
  • University of Cincinnati, Department of Psychiatry and Behavioral Neuroscience
    Cincinnati, Ohio 45219, United States
09

References and documents

Study documents

  • Protocol and statistical analysis plan · Jun 19, 2013

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 16, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT01883817
Lead sponsor
University of Cincinnati
Collaborators
DSM Nutritional Products, Inc.
Responsible party
Robert McNamara (Associate Professor, University of Cincinnati) — Principal investigator
First posted
Jun 21, 2013
Start date
Sep 2013
Primary completion
Mar 3, 2017
Completion
Mar 3, 2017
Results posted
Mar 16, 2022
Last update
Mar 16, 2022

Study contacts

Robert K McNamara, PhD
principal investigator · University of Cincinnati

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2022. You cannot join it, but the record below documents what was studied.

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