
Patients with dual sensory impairment are less likely to functionally improve post vision rehab
Investigators from Wilmer Eye Institute and The Johns Hopkins Bloomberg School of Public Health, both in Baltimore, reported in JAMA Ophthalmology1 that patients with dual sensory impairment (ie, hearing and vision) had a “reduced likelihood of functional improvement following vision rehabilitation.”
The investigators, led by first author Anas Obaideen, MBBS, MPH, suggest that interdisciplinary rehabilitation efforts may better benefit patients with dual sensory impairment.
They explained that dual sensory impairment is “a complex barrier to daily functioning” that affects 5.5% of individuals globally and is expected to increase by 27.4% over the next 2 decades. They cited studies that reported that more than 40% of visually impaired individuals are also hearing impaired.2,3 They also pointed out that dual sensory impairment “is associated with increased odds of cognitive impairment, exceeding the risk associated with single sensory loss."4
At the same time, they reported that little research has examined whether hearing impairment affects rehabilitation outcomes.
In light of this, they conducted a cross-sectional study to identify if there is an association between impaired hearing and achieving a clinically meaningful functional improvement after vision rehabilitation.
The data from 611 patients in the Low Vision Rehabilitation Outcomes Study,2 a prospective cohort study on clinical outcomes of vision rehabilitation, were analyzed. All patients were visually impaired and had self-reported hearing status available. Of these patients, 407 had complete follow-up data after rehabilitation.
The main outcome was improved general capabilities compared with before rehabilitation, as measured using the Activity Inventory, a validated visual function questionnaire comprising 459 items subsumed under 50 goals, administered via a computer-assisted interview.5 Obaideen and colleagues considered rehabilitation to be effective when a minimum clinically important difference (MCID) was reached, they explained.
What did the data analysis find?
Analysis of the 611 patients (mean age, 73 years) showed that 358 had normal hearing and 253 had self-reported hearing impairment.
The researchers found that “a smaller proportion of participants with hearing impairment achieved a mean MCID after vision rehabilitation (39/169 [23%] vs 74/238 [31%]; odds ratio [OR], 0.58; 95% confidence interval [CI], 0.34-0.95; P = 0 .03); this association was not attenuated by possession of hearing aids (17/74 [23%] vs 21/95 [22%]). In addition to better hearing status, participants with severe vision impairment (OR, 3.32; 95% CI, 1.2-11.86; P = 0 .04) and higher depressive symptoms (OR, 1.38 per logit increase; 95% CI, 1.17-1.63; P < 0.001) were more likely to achieve a MCID.”
They also explained that, in their study, patients with low vision and hearing impairment were older and had lower physical health status scores than those with normal hearing, both at baseline and after rehabilitation.
“Despite similar baseline visual abilities and self-reported vision impairment severity, participants with hearing impairment were less likely to achieve an MCID in Activity Inventory ability following rehabilitation. This difference persisted regardless of history of hearing aid use and was consistent across all levels of self-reported vision status. These results emphasize the importance of addressing hearing-related barriers within vision rehabilitation care and tailoring treatment for individuals with dual sensory impairment,” Obaideen and colleagues concluded.






















