Trial accrual problems

This trial aims to investigate whether analgesic ear drops added to usual care provide superior ear pain relief over usual care alone in children presenting to primary care with AOM. Children will be randomly allocated (ratio 1:1) to either 1) lidocaine hydrochloride 5mg/g ear drops (Otalgan) 1-2 drops up to six times daily for a maximum of 7 days in addition to usual care (oral analgesics, with/without antibiotics) or 2) usual care. Parents will complete a symptom diary for 4 weeks as well as generic and disease-specific quality of life questionnaires at baseline and 4 weeks. The primary outcome is the parent-reported ear pain score (0-10) over the first 3 days.

NOTE:

At the time of publication of the study protocol paper, the investigators were unable to make any amendments to the trial registration record in the Netherlands Trial Register (NTR) (NL9500; date of registration: 28 May 2021). The addition of a data sharing plan was required to adhere to the International Committee of Medical Journal Editors (ICMJE) guidelines. The investigators therefore re-registered the trial in ClinicalTrials.gov. This second registration is for modification purposes only and the NTR record (NL9500) should be regarded as the primary trial registration.

Inclusion Criteria:

• Age 1 to 6 years
• Parent-reported ear pain in 24 hours prior to enrolment
• GP-diagnosis of (uni- or bilateral) AOM

Exclusion Criteria:

• with (suspected) tympanic membrane perforation or ventilation tubes
• with ear wax obscuring visualisation of the tympanic membrane
• who are systemically very unwell or require hospital admission (e.g. child has signs and symptoms of serious illness and/or complications such as mastoiditis/meningitis)
• who are at high risk of serious complications including children with known immunodeficiency other than partial IgA or IgG2 deficiencies, craniofacial malformation including cleft palate, Down syndrome and previous ear surgery (with the exception of ventilation tubes in the past)
• who have a known allergy or sensitivity to study medication or similar substances (e.g. other amide-type anaesthetics: bupivacaine, mepivacaine, prilocaine, etc)
• who have taken part in any research involving medicines within the last 90 days, or any other AOM-related research within the last 30 days
• who suffer from chronic recurrent pain of another origin than the ear
• who have participated in this trial during prior AOM episode

On completion of the trial, data will be stored for a minimum of 25 years at a central data drive at the Julius Center. The investigators will publish the metadata in the DataverseNL repository and will provide a persistent identifier. The data will be available to researchers who provide a methodologicaly sound proposal to achieve the aims in the approved proposal. Proposals to gain access to the data should be directed to the principle investigator (RPV). Data requestors will need to sign a data sharing agreement.