Untreated Hearing Loss Identified as Top Modifiable Dementia Risk

Key points

• Dr. Stephanie Rogers, a geriatrician at UCSF, states that untreated hearing loss is the number one modifiable risk factor for dementia.
• Hearing loss can begin in the teens or 20s due to noise exposure, but symptoms often become noticeable in mid-life.
• The condition increases cognitive load, causes brain atrophy, and leads to social isolation, all of which contribute to cognitive decline.
• Screening is recommended at age 50, then every three to five years until age 65, and every one to three years thereafter.
• Hearing aids, including over-the-counter options for mild loss, are a first-line treatment to mitigate these risks.

Background

Recent WHO guidelines have identified 19 modifiable risk factors for dementia, with lifestyle changes potentially preventing or delaying 45% of cases. Previous coverage noted that vascular factors and dietary habits, such as high sugar and processed meat consumption, also significantly impact dementia risk. Hearing loss has consistently been highlighted in these frameworks as a critical, addressable component of brain health.

How outlets are covering it

While TODAY.com and Everyday Health agree that hearing loss is the top modifiable risk factor, they emphasize different mechanisms. TODAY.com highlights the cognitive load of decoding speech and the resulting depletion of brain reserves. Everyday Health focuses on the link between hearing loss and mild cognitive impairment (MCI), noting that treatment may slow cognitive decline in high-risk groups. The Portland Press Herald provides a practical, household-level perspective, illustrating how untreated hearing loss can mimic memory issues and cause social withdrawal. It cites a Johns Hopkins study showing that severe untreated hearing loss increases dementia risk fivefold, and notes that while hearing aids do not universally stop decline, they reduced the rate by nearly 50% in high-risk participants in an NIH trial.

Why it matters

Dementia affects at least 7 million Americans. Recognizing that hearing loss is a modifiable risk factor empowers individuals to take preventive action. Early screening and the use of hearing aids can help maintain social engagement and cognitive function, potentially delaying the onset of dementia and improving quality of life for both patients and their families.

What to watch

Individuals should monitor for signs of hearing loss, such as difficulty understanding speech in noisy environments or needing to increase volume on devices. If symptoms appear, they should consult a doctor for a referral to an audiologist. Regular screening, starting at age 50, is advised to detect and address hearing issues before they contribute to cognitive decline.