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RecruitingNCT04477460BRUEUpdated Oct 22, 2026

Effect of Thickened Feeds on Clinical Outcomes in Children With Brief Resolved Unexplained Event

An observational study in Brief Resolved Unexplained Event, Apparent Life Threatening Event and Oropharyngeal Dysphagia, sponsored by Boston Children's Hospital. Recruiting at 1 site in United States. Open to participants aged 0 Months to 12 Months. Per ClinicalTrials.gov, last updated 2026-10-22.

Sponsored by Boston Children's Hospital · Observational

From the registry’s dates

  • Started Apr 2021; still recruiting 5 years 7 months later.
Updated Oct 22, 2026Primary completion movedStudy completion movedGo to Updates ↓
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
250
Ages
0 Months to 12 Months
Sex
All
01

Study summary

This observational study will examine the effects of thickened feeds on clinical outcomes and healthcare utilization in infants with brief resolved unexplained event (BRUE).

Read the detailed description

Brief resolved unexplained events (BRUE) are frightening episodes characterized by the appearance of life-threatening choking, pallor, cyanosis, and limpness in infants. These common events are resource-intensive and current management approaches inadequately address persistent symptoms. Infants with BRUE commonly have oropharyngeal dysphagia with aspiration, which is a modifiable risk factor for persistent symptoms, but there are no studies determining the mechanism behind this swallowing dysfunction and if swallowing interventions reduce morbidity. This is a prospective, longitudinal cohort study of infants who experienced brief resolved unexplained event receiving thickened feedings compared to those not receiving thickened feedings over 1 year.

02

Conditions studied

  • Brief Resolved Unexplained Event
  • Apparent Life Threatening Event
  • Oropharyngeal Dysphagia

Browse trials for

03

In context

Deglutition Disorders

871 studies on the registry are indexed under Deglutition Disorders; 237 are open to participants now.

This study's planned enrollment of 250 is above the median of 84 across 249 observational studies indexed under Deglutition Disorders.

Browse Deglutition Disorders studies →

Lead sponsor

Boston Children's Hospital is the lead sponsor of 608 studies on the registry; 147 are open to participants now.

Of its 32 completed or terminated interventional studies of FDA-regulated products, 19 (59%) have results posted.

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

04

Who can participate

Ages eligible
0 Months to 12 Months
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Participants will be eligible for the study if they are less than 1 year of age and admitted to Boston Children's Hospital after experiencing first lifetime BRUE

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Less than 1 year of age
  • Admitted to Boston Children's Hospital after experiencing first lifetime brief resolved unexplained event.

Exclusion criteria

Exclusion Criteria:

  • Any pre-existing medical diagnoses that exclude brief resolved unexplained event diagnosis including seizure disorders and cyanotic congenital heart disease
  • Already receiving thickened liquids for treatment of another condition
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
250 participants (estimated)
Patient registry
No
Biospecimen retention
Samples without dna

Groups and cohorts

  • Infants with BRUE receiving thickened feeds

    Dietary Supplement: Thickened feeds

  • Infants with BRUE not receiving thickened feeds

    Dietary Supplement: Non-thickened feeds

Interventions

  • Dietary supplementThickened feeds

    Thickened feeds directed by medical team

  • Dietary supplementNon-thickened feeds

    Non-thickened feeds directed by medical team

06

What researchers measure

Primary outcomes

  1. Frequency of persistent symptoms and repeat hospitalizations over 6-month follow-up period

    Frequency of persistent symptoms and repeat hospitalizations over the 6 months after enrollment, with a comparison between those receiving and not receiving thickened feeds.

    Time frame: 6 months

Secondary outcomes

  1. Frequency of persistent symptoms and hospitalization risk over the full 12-month follow-up period

    Symptoms and hospitalization risk over the full 12-month follow-up period, optimal period of time needed for thickening, parent-reported anxiety levels, cost of care at Boston Children's Hospital, potential adverse effects of thickening, and urine arsenic levels, all compared between subjects receiving and not receiving thickened feeds.

    Time frame: 12 months

07

Study locations

1 of 1 sites recruiting
08

References and documents

Publications

  • Duncan DR, Growdon AS, Liu E, Larson K, Gonzalez M, Norris K, Rosen RL. The Impact of the American Academy of Pediatrics Brief Resolved Unexplained Event Guidelines on Gastrointestinal Testing and Prescribing Practices. J Pediatr. 2019 Aug;211:112-119.e4. doi: 10.1016/j.jpeds.2019.04.007. Epub 2019 May 15. PubMed 31103259 ↗
  • Duncan DR, Amirault J, Mitchell PD, Larson K, Rosen RL. Oropharyngeal Dysphagia Is Strongly Correlated With Apparent Life-Threatening Events. J Pediatr Gastroenterol Nutr. 2017 Aug;65(2):168-172. doi: 10.1097/MPG.0000000000001439. PubMed 27741062 ↗
  • Duncan DR, Liu E, Growdon AS, Larson K, Rosen RL. A Prospective Study of Brief Resolved Unexplained Events: Risk Factors for Persistent Symptoms. Hosp Pediatr. 2022 Dec 1;12(12):1030-1043. doi: 10.1542/hpeds.2022-006550. PubMed 36336644 ↗
  • Duncan DR, Golden C, Larson K, Growdon AS, Liu E. A prospective study of diagnostic testing and hospital charges after brief resolved unexplained event. J Pediatr Gastroenterol Nutr. 2025 Apr;80(4):623-632. doi: 10.1002/jpn3.12465. Epub 2025 Jan 28. PubMed 39871744 ↗
  • Duncan DR, Golden C, Growdon AS, Larson K, Rosen RL. Brief Resolved Unexplained Events Symptoms Frequently Result in Inappropriate Gastrointestinal Diagnoses and Treatment. J Pediatr. 2024 Sep;272:114128. doi: 10.1016/j.jpeds.2024.114128. Epub 2024 May 28. PubMed 38815745 ↗
09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedDate before it movedWhere the date was before it movedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Apr 2021 (actual). Primary completion is estimated for Aug 2027, 76 months after the start.

Of 117 non-industry observational studies under Deglutition Disorders, half reached primary completion within 25 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 52. This study's planned 76 months is above that.

Counting every sponsor, half of 120 studies reached it within 25 months; a quarter within 11 and three quarters within 49.

Since we started tracking on Sep 25, 2026, the dates moved once, on Oct 22, 2026: primary completion Aug 2026 → Aug 2027 and completion Aug 2026 → Aug 2027.

Earlier changes are on the record history on ClinicalTrials.gov ↗

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

Registered
Jul 15, 2020
First posted
Jul 20, 2020
StartActual
Apr 1, 2021
Primary completionEst.
Aug 31, 2027was Aug 2026
CompletionEst.
Aug 31, 2027was Aug 2026
Last update
Oct 22, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
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.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Primary completion
Aug 31, 2026→Aug 31, 2027
Oct 22, 2026
Study completion
Aug 31, 2026→Aug 31, 2027
Oct 22, 2026
Publications
1 publication citing this study linked from PubMed, e.g. PubMed 39871744 ↗
Oct 22, 2026
Show all 1 update
  1. Oct 22, 2026
    Publications 1 publication citing this study linked from PubMed, e.g. PubMed 39871744 ↗
    Primary completion Aug 31, 2026→Aug 31, 2027
    Study completion Aug 31, 2026→Aug 31, 2027
    + 1 other change: verification date

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT04477460
Responsible party
Daniel Duncan (Assistant Professor of Pediatrics, Boston Children's Hospital) — Principal investigator
First posted
Jul 20, 2020
Start date
Apr 1, 2021
Primary completion
Aug 31, 2027 (estimated)
Completion
Aug 31, 2027 (estimated)
Last update
Oct 22, 2026

Study contacts

Daniel R Duncan, MD, MPH
Contact
daniel.duncan@childrens.harvard.edu
6173550897
Daniel R Duncan, MD, MPH
principal investigator · Boston Children's Hospital
Rachel Rosen, MD, MPH
study director · Boston Children's Hospital
Sudarshan Jadcherla, MD
study director · Nationwide Children's Hospital
Taher Omari, PhD
study director · Flinders University
Samuel Nurko, MD, MPH
study director · Boston Children's Hospital

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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