Affordable, accessible, community‐delivered hearing care among individuals with cognitive impairment: Lessons from the HEARS RCT

Abstract

AbstractBackgroundHearing loss is highly prevalent and associated with adverse health outcomes but undertreated among individuals with cognitive impairment, particularly African Americans. The incorporation of community health worker (CHW)‐partnered models may increase access and reduce disparities.The HEARS intervention is a hearing care program delivered by CHWs that provides a low‐cost amplification device. To assess the efficacy of CHW‐delivered hearing care provided to community‐dwelling older adults, including those with cognitive impairment, a randomized clinical trial was conducted.MethodAn open label randomized clinical trial took place in 13 community sites in Baltimore, Maryland. 348 older adults were screened and 151 participants with hearing loss were randomized to receive a CHW‐delivered hearing care intervention versus 3‐month waitlist control.The primary outcome was change in communication function (Hearing Handicap Inventory for the Elderly‐Screening [HHIE‐S]) from baseline to 3‐months post‐randomization. The average treatment effect was estimated using the doubly‐robust weighted least squares estimator. This pre‐specified subgroup analysis was stratified by cognitive status using the total MoCA score (≤25: cognitive impairment; post hoc sensitivity analysis using ≤22).ResultAmong 149 randomized participants with MoCA data, 100 individuals were cognitively impaired (Mean adjusted MoCA: 21(SD 3.5); 52% African American; 70% low‐income). At 3‐months post‐intervention, 66% with cognitive impairment reported daily device use versus 76% for those without cognitive impairment. Communication function significantly improved among individuals with cognitive impairment compared with the control, with an estimated average treatment effect of ‐13.92 HHIE‐S change (95% CI:‐16.84,‐10.86), comparable to those without cognitive impairment (‐11.47; 95% CI:‐18.04,‐4.17). Post hoc sensitivity analysis using a ≤22 MoCA cut‐off for cognitive impairment yielded similar findings.ConclusionAmong individuals with cognitive impairment, a CHW‐delivered low‐cost amplification device intervention, compared with a waitlist control, significantly improved communication function. The improvements were comparable to participants without cognitive impairment and similar in magnitude to improvements documented for older adults who received conventional clinic‐based hearing care with hearing aids fit by audiologists. To the authors’ knowledge, this trial was the largest trial to date of a hearing care intervention in the U.S. of African American older adults and low‐income older adults with hearing loss and cognitive impairment.