Evidence brief · Capacity

Hearing Loss, Listening Effort and Cognition

Hearing assessment can address present communication difficulties. The dementia discussion must retain ACHIEVE's overall null result and the limits of its subgroup finding.

By Andre Heeg, MD, DDSCreated October 7, 2026
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Key Takeaways

Hearing assessment can address present communication difficulties. The dementia discussion must retain ACHIEVE's overall null result and the limits of its subgroup finding.

  • The ACHIEVE trial was neutral overall; the 48% result concerned cognitive-score decline in a higher-risk subgroup. [1]
  • Hearing assessment includes communication difficulties, including problems in noise that an audiogram may not explain. [2]
  • Listening effort and fatigue are separate outcomes. Neither a demanding listening task nor a hearing-aid fitting establishes dementia prevention. [1] [3]

Common questions

Does treating hearing loss prevent dementia?

ACHIEVE did not demonstrate an overall reduction in cognitive decline over three years. The higher-risk subgroup result is encouraging but does not establish a general dementia-prevention promise. [1]

What does the 48% figure mean?

It describes slower decline in a cognitive-test score in a planned subgroup, not an individual probability of avoiding dementia. [1]

Can a normal audiogram miss a practical hearing problem?

NICE recognizes that difficulties in noisy settings may not be apparent from the audiogram. Assessment includes the person's communication needs and reported problems. [2]

When does sudden hearing loss need urgent care?

Sudden new hearing loss needs prompt medical assessment. NICE calls for assessment within 24 hours when unexplained loss developed over three days or less within the past 30 days. [2]

What belongs in a hearing-aid follow-up?

NICE includes comfort, sound quality, handling, maintenance and whether hearing and communication needs are being met. Persistent difficulty is a reason to reassess the plan. [2]

References

  1. Lin et al. (2023). ACHIEVE randomized trial.
  2. NICE NG98, adult hearing assessment and referral (n.d.). Research source.
  3. Zink et al. (2025). midlife listening effort.

Related reading

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