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Active, not recruitingNCT05608993RELAXUpdated Aug 17, 2025

RELAX: Reducing Length of Antibiotics for Children With Ear Infections

An interventional study of High Intensity Intervention and Low Intensity Intervention in Acute Otitis Media, Pediatric Infectious Disease and Ear Infection, sponsored by Intermountain Health Care, Inc.. Active, not recruiting at 1 site in United States. Open to participants aged 2 Years to 17 Years. Per ClinicalTrials.gov, last updated 2025-08-17.

Sponsored by Intermountain Health Care, Inc. · Not applicable, Interventional, and Health services research

Phase
Not applicable
Study type
Interventional
Enrollment
500
Allocation
Randomized
Ages
2 Years to 17 Years
Sex
All
01

Study summary

The overarching goal of this study is to evaluate the effectiveness and implementation outcomes of two low-cost interventions of different intensities to increase prescribing of recommended short antibiotic durations for acute otitis media (AOM) for children 2 years of age and older. A multi-center cluster randomized controlled trial using a hybrid type 2 implementation effectiveness design will be used to evaluate interventions. The High-Intensity intervention will include clinician education, individualized clinician audit and feedback with peer comparison, and electronic health record (EHR) changes of prescription fields, whereas the Low-Intensity intervention will include clinician education and EHR changes. In total, 46 community-based clinics and/or urgent care centers across two distinct geographic regions in the United States will be randomized to one of the two interventions. The Practical Robust Implementation and Sustainability Model (PRISM) will be used to guide implementation and the Reach Effectiveness Adoption Implementation Maintenance (RE-AIM) framework will be used to evaluate outcomes. A mixed-methods approach will be used in the pre-implementation and evaluation phases and will utilize quantitative analyses, semi-structured interviews, focus groups, surveys, and cost analyses. National stakeholders at the American Academy of Pediatrics and the Centers for Disease Control and Prevention will assist with dissemination of findings and scaling of interventions.

Read the detailed description

Acute otitis media (AOM) is the most commonly cited indication for antibiotics in children, accounting for 24% of all pediatric antibiotic prescriptions and affecting 60% of children by 3 years of age. For most children ≥ 2 years of age with AOM, 5-7 days, rather than 10 days, of antibiotics have been shown to be sufficient and result in fewer adverse drug events with similar failure and recurrence rates. Thus, national guidelines recommend short durations of antibiotics for non-severe AOM in this age group. Despite these recommendations, >94% of children ≥2 years of age are prescribed longer than recommended antibiotic durations and over 41% of antibiotic exposure days for AOM in this age group are likely unnecessary. In a recent pilot study that compared a low-cost High-intensity intervention with clinician education, individualized clinician audit and feedback with peer comparison and electronic health record (EHR) changes of prescription fields to a Low-intensity intervention with only EHR changes prescribing of recommended short antibiotic durations increased significantly (76% and 50%, absolute percentage). A definite study is needed to make appropriate recommendations on which intervention to implement, while minimizing resource utilization.

The overarching goal of this study is to evaluate the effectiveness and implementation outcomes of two low-cost pragmatic interventions of different intensities to increase prescribing of recommended short antibiotic durations for AOM for children 2 years of age and older. A multi-center cluster randomized controlled trial using a hybrid type 2 implementation effectiveness design will be used to evaluate interventions. The High-intensity intervention will include clinician education, individualized clinician audit and feedback with peer comparison, and EHR changes of prescription fields, whereas the Low-intensity intervention will include clinician education and EHR changes. In total, 46 community-based clinics and/or urgent care centers across two distinct geographic regions in the United States will be randomized to one of the two interventions. The Practical Robust Implementation and Sustainability Model will be used to guide implementation and the Reach Effectiveness Adoption Implementation Maintenance framework will be used to evaluate outcomes. A mixed-methods approach will be used in the pre-implementation and evaluation phases and will utilize quantitative analyses, semi-structured interviews, focus groups, surveys, and cost analyses.

02

Conditions studied

  • Acute Otitis Media
  • Pediatric Infectious Disease
  • Ear Infection

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Keywords

  • Acute Otitis Media
  • Ear Infections
  • Pediatric Infectious Disease
  • Electronic Health Record
  • Antibiotic Stewardship
03

In context

Otitis Media

241 studies on the registry are indexed under Otitis Media; 32 are open to participants now.

This study's planned enrollment of 500 is above the median of 165 across 174 interventional studies indexed under Otitis Media.

Browse Otitis Media studies →

Lead sponsor

Intermountain Health Care, Inc. is the lead sponsor of 120 studies on the registry; 15 are open to participants now.

Of its 9 completed or terminated interventional studies of FDA-regulated products, 3 (33%) have results posted.

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

04

Who can participate

Ages eligible
2 Years to 17 Years
Sexes eligible
All
Accepts healthy volunteers
No

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

A. Secondary use data of encounters for children with AOM

  1. Aged 2-17-years-old (inclusive)
  2. Diagnosis of AOM by ICD10 code
  3. AOM is uncomplicated
  4. Prescribed an oral antibiotic

B. Clinician and administrator interviews

  1. Licensed clinician (physician or advanced practice clinician) that cares for children with AOM
  2. Practices in an intervention study site
  3. Is not a medical trainee (student, resident, fellow, etc.)
  4. Aged >=18 years-no maximum

C. Parent focus groups

  1. Parent or legal guardian of a child aged 2-17 years that has had AOM diagnosed at Vanderbilt University Medical Center or Washington University
  2. 18 years of age or older and able/willing to consent

D. Clinician and administrator surveys

  1. Licensed clinician (physician or advanced practice clinician) that cares for children with AOM
  2. Practices in an intervention study site
  3. Is not a medical trainee (student, resident, fellow, etc.)
  4. Aged >=18 years-no maximum

Exclusion criteria

Exclusion Criteria:

A. Secondary use data of encounters for children with AOM

1. Complicated infection (determined a priori)

B. Clinician and administrator interviews 1. Medical trainee

C. Parent focus groups

  1. Not parent or legal guardian
  2. Does not speak English or Spanish (focus groups can only be conducted in these languages).

D. Clinician and administrator surveys

1. Medical trainee

05

Study design

Phase
Not applicable
Primary purpose
Health services research
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
500 participants (estimated)

Study arms

  • Experimental
    High Intensity

    Community-based clinics and/or urgent care centers that are assigned to the high intensity arm will receive the high intensity intervention.

    Other: High Intensity Intervention

  • Experimental
    Low Intensity

    Community-based clinics and/or urgent care centers that are assigned to the low intensity arm will receive the low intensity intervention.

    Other: Low Intensity Intervention

Interventions

  • OtherHigh Intensity Intervention

    The High Intensity intervention will include clinician education, individualized clinician audit and feedback with peer comparison, and electronic health record (EHR) changes of prescription fields.

  • OtherLow Intensity Intervention

    The Low Intensity intervention will include clinician education and EHR changes only.

06

What researchers measure

Primary outcomes

  1. Proportion of children ≥ 2 years of age with AOM that are prescribed a short duration (5 days) of antibiotics.

    Determine the effectiveness of a High and Low intensity intervention to increase prescribing of recommended antibiotic durations (short, 5 days) for AOM in children ≥ 2 years of age.

    Time frame: 5 years

Secondary outcomes

  1. Mean days of antibiotics prescribed

    Mean number of days of antibiotics prescribed for children ≥ 2 years of age with AOM

    Time frame: 5 years

  2. Adverse drug event

    Number of adverse drug events among children ≥ 2 years of age prescribed antibiotics for AOM

    Time frame: 5 years

  3. Treatment failure

    Treatment failure defined as a new antibiotic associated with an AOM encounter within 3-14 days of the initial encounter.

    Time frame: 5 years

  4. Recurrence

    Recurrence defined as a new antibiotic associated with an AOM encounter within 15-30 days of initial encounter.

    Time frame: 5 years

07

Study locations

1 site
08

References and documents

Publications

  • Rinehart DJ, Gilbert A, O'Leary S, Katz SE, Frost HM. Reducing antibiotic duration for acute otitis media: clinician, administrator, and parental insights to inform implementation of system-level interventions. Antimicrob Steward Healthc Epidemiol. 2025 Jan 6;5(1):e3. doi: 10.1017/ash.2024.469. eCollection 2025. PubMed 39781291 ↗
  • Keith A, Jenkins TC, O'Leary S, Stein AB, Katz SE, Newland J, Rinehart DJ, Gilbert A, Dodd S, Terrill CM, Frost HM. Reducing length of antibiotics for children with ear infections: protocol for a cluster-randomized trial in the USA. J Comp Eff Res. 2023 Nov;12(11):e230088. doi: 10.57264/cer-2023-0088. Epub 2023 Oct 19. PubMed 37855227 ↗

Individual participant data

Plan to share: No — IPD will not be shared with other researchers.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar 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 2024 (actual). Primary completion is estimated for Apr 2027, 36 months after the start.

Of 36 non-industry interventional studies with no phase under Otitis Media, half reached primary completion within 38 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 64. This study's planned 36 months is close to that.

Counting every sponsor, half of 45 studies reached it within 38 months; a quarter within 13 and three quarters within 51.

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

Registered
Oct 24, 2022
First posted
Nov 8, 2022
StartActual
Apr 1, 2024
Primary completionEst.
Apr 2027
CompletionEst.
Oct 2027
Last update
Aug 17, 2025
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.
No changes since tracking began. The registry record was last updated on Aug 17, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05608993
Collaborators
Agency for Healthcare Research and Quality (AHRQ), Vanderbilt University Medical Center, Washington University School of Medicine
Responsible party
Sponsor
First posted
Nov 8, 2022
Start date
Apr 1, 2024
Primary completion
Apr 2027 (estimated)
Completion
Oct 2027 (estimated)
Last update
Aug 17, 2025

Study contacts

Holly M Frost, MD
principal investigator · Intermountain Health Care, Inc.
Sophie E Katz, MD
principal investigator · Vanderbilt University Medical Center
Jason Newland, MD
principal investigator · Washington University School of Medicine
Timothy C Jenkins, MD
principal investigator · Denver Health and Hospital Authority

Oversight

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

Not currently enrolling

This study is active, not recruiting, as verified in Aug 2025. You cannot join it, but the record below documents what was studied.

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