Consideration of Demographic Variables in Behavioral Interventions Pertaining to Children With Hearing Loss: A Systematic Review.

Purpose: Equitable representation of children with hearing loss who are members of marginalized or minority groups in behavioral intervention studies enhances inclusivity in the scientific process and generalizability of results. The goal of this systematic review was to ascertain the percentage of studies conducted in the United States in the past 2 decades that reported relevant demographic variables.

Method: Studies were searched across eight databases and clinical trial registries in October 2022. Variations of the following search strings were used to retrieve peer-reviewed published studies and unpublished clinical trials: children, hearing loss, and intervention.

Results: Thirty-nine intervention studies met the inclusion criteria. The selected studies were reviewed and coded for the following demographic variables: area and type of intervention, participant age, hearing technology data, sample size, gender, race/skin color and ethnicity, primary/home language(s), additional disabilities, parental education, family income, and parental occupation. Results revealed that many demographic variables were remarkably underreported, with parental education, family income, and parental occupation variables being the least reported data.

Conclusions: Demographic data can be an important tool for changing disparities related to intervention outcomes. This systematic review suggests that inclusive research practices should be extended to low-literacy or low-economic resources, non-White, and non-English-speaking groups. Inclusion practices coupled with sufficient sample sizes will ultimately aid in identifying hearing health disparities.