Clinical trial NCT00727909: Evaluation of Open-canal Behind-the-Ear Hearing Aids and Traditional In-the-ear Hearing Aids.
Official title: Evaluation of Open-Ear Canal and Traditional Custom-Fit Hearing Aids
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Hearing Loss
Keywords: Hearing loss
Hearing Aids
Speech Perception
Persons with Hearing Impairment
Lead sponsor: VA Office of Research and Development
Sponsor class: FED
Collaborators: name: Vanderbilt University
First posted: 2008-08-04
Enrollment: 290
Sex: ALL
Minimum age (years): 21
Maximum age (years): 85
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: This study is being conducted to evaluate the benefits of in-the-ear vs. open-fit behind-the-ear hearing aids. We want to learn more about which patients prefer each type, so we can make better choices about which type of hearing aid is best for which patients. Participants in this study will try three different sets of hearing aids for 2 months each, then we will evaluate the benefit of each type. Participants must be Veterans who are eligible for audiology care at one of the three participating sites.

Detailed description: Hearing loss is the most common service-connected disability nationwide in the Veteran's Health Administration (VHA) system, with hearing aids providing the primary treatment option. Although the benefits of hearing-aid use are clearly established,\~16-30% of adults who have hearing aids do not use them. Several factors are believed to result in non-use of traditional hearing aids, including (1) poor fit and comfort, (2) poor cosmetics, (3) whistling feedback, (4) occlusion, and (5) difficulty understanding speech in noise.

Recently, the open canal (OC) hearing-aid style has become a viable approach to addressing address many of the problems resulting in non-use of traditional hearing aids, particularly for individuals with mild to moderately-severe hearing loss. Although an OC hearing aid has many potential advantages, there also are potential limitations. For example, the maximum low and high-frequency gain available with an OC fitting is less than that available from traditional custom (TC) hearing-aid fittings, which could result in less than optimal amplification for some individuals. In addition, directional microphone benefits for speech understanding in noise, available with TC fittings, likely will be limited with OC fittings due to the loss of low-frequency gain (Ricketts et al., 2005).

Since both OC and TC fittings are appropriate for listeners with mild to moderately-severe hearing losses, evidence is needed to determine which style of hearing aid is preferred by a majority. Currently, OC fittings use a small behind-the-ear (BTE) hearing aid coupled to a thin tube or plastic covered wire ending in a vented "open" ear tip. When a TC fitting is used with patients with similar hearing losses, the majority are either an in-the-ear (ITE) or in-the-canal (ITC) .In the proposed study a comparison will be made between OC vs. TC fittings. In addition to this primary comparison, preference for one of two OC hearing aids, viz., OC instruments with receiver in the ear (OCRITE) and the OC instruments with receiver in the hearing-aid case (OCRIHA), will be determined. The outcomes of the OCRITE, OCRIHA, and TC hearing-aid use related to the factors of: (1) comfort and cosmetics, (2) subjective occlusion, (3) objective occlusion, (4) sound quality for external sounds, (5) feedback, (6) ease of use, (7) audibility, (8) aided signal-to-noise ratio (SNR) benefit, and (9) localization, will be measured in a large (n = 288), randomized-controlled, three-site (Bay Pines, Mountain Home, and Nashville) clinical trial, utilizing a three-period (two months each), cross-over design. A total of 13 variables will be measured for the 9 hearing-aid fitting and style-related factors. At the end of the study, participants will rank order their preferences for the three hearing aid fittings to determine (1) the preferred OC fitting (OCRITE vs. OCRIHA) and (2) whether the highest ranked OC fitting or the TC fitting is preferred. Preferred OC vs. TC difference scores will be calculated for all relevant variables. The ability of the differences scores to predict the preferences of the participants for an OC vs. TC hearing aid will be determined, in order to develop an evidence-based hearing aid selection model.

Eligibility criteria: Inclusion Criteria:

* Sensorineural hearing loss
* Veteran-adult onset of hearing
* English as first language
* Eligible for VA issued hearing aids
* Eligible to receive care at one of the three participating VA sites: Nashville, Tennessee, Mountain Home Tennessee, Bay Pines Florida

Exclusion Criteria:

* Known neurological, psychiatric disorders, or co-morbid disease that would prevent completion of the study
* Inadequate vision
* Inadequate reading skills

Primary outcomes:
measure: Percentage of Participants That Selected a Particular Type of Hearing Aid
timeFrame: At the end of the 6 month trial (after having worn each set of hearing aids for 2 months each)
Secondary outcomes:
Other outcomes:
Locations:
city: Bay Pines
country: United States
facility: VA Medical Center, Bay Pines
state: Florida
city: Mountain Home
country: United States
facility: James H. Quillen VA Medical Center
state: Tennessee
city: Nashville
country: United States
facility: VA Medical Center
state: Tennessee
Study officials:
affiliation: VA Medical Center
name: Gene W. Bratt, PhD MA BA
role: PRINCIPAL_INVESTIGATOR
References: