33-017 · EVIDENCE A · LOW-RISK READING
Getting a hearing aid when hearing declines — the reason is to hear better now, not to prevent dementia
听力下降就去配助听器，配它的理由是听得见，不是防痴呆
Hearing aids cost several thousand to tens of thousands of yuan; most must be paid for out of pocket. Fitting requires professional testing and multiple follow‑up adjustments.
The claim that “wearing a hearing aid prevents dementia” currently lacks solid evidence. A three‑year trial involving nearly a thousand participants found no overall difference between groups. Only among people already at higher risk of cognitive decline did a modest benefit appear. Thus, the main reason to get a hearing aid is to hear clearly now — to talk with others and hear traffic while crossing the street — not to protect the brain decades later.
A
Move “Getting a hearing aid when hearing declines — the reason is to hear better now, not to prevent dementia” to Future Me's calendar
The excuse
The routine already works until the day the source says it may not.
What feels good now
Today I keep a little money, a few minutes, a bit of persistence and avoid interrupting my default routine.
What the source says
The source summarizes the return this way: “The claim that “wearing a hearing aid prevents dementia” currently lacks solid evidence. A three‑year trial involving nearly a thousand participants found no overall difference between groups. Only among people already at higher risk of cognitive decline did a modest benefit appear. Thus, the main reason to get a hearing aid is to hear clearly now — to talk with others and hear traffic while crossing the street — not to protect the brain decades later.” Evidence grade A. The original states the population, caveats, and sources; this is not a personal forecast.
Open the original entry, check who the evidence applies to, then pick one small step that fits.
THE ENGLISH EDITION
Original recommendation and evidence
17. Getting a hearing aid when hearing declines — the reason is to hear better now, not to prevent dementia
Cost: Hearing aids cost several thousand to tens of thousands of yuan; most must be paid for out of pocket. Fitting requires professional testing and multiple follow‑up adjustments.
In plain terms: The claim that “wearing a hearing aid prevents dementia” currently lacks solid evidence. A three‑year trial involving nearly a thousand participants found no overall difference between groups. Only among people already at higher risk of cognitive decline did a modest benefit appear. Thus, the main reason to get a hearing aid is to hear clearly now — to talk with others and hear traffic while crossing the street — not to protect the brain decades later.
Benefit: The ACHIEVE trial took place in four U.S. communities and enrolled 977 individuals aged 70–84 with untreated hearing loss but no obvious cognitive impairment. Participants were randomly assigned to either hearing intervention (counseling and hearing aid fitting) or health‑education control, with follow‑up every six months. The primary endpoint was change in overall cognitive scores over three years. In the combined analysis of both participant cohorts, there was no significant difference: the intervention group showed a change of −0.200 (95% CI −0.256 to −0.144) versus −0.202 (95% CI −0.258 to −0.145) in the control group; the difference was 0.002 (95% CI −0.077 to 0.081, P = 0.96). A pre‑specified sensitivity analysis revealed a statistically significant interaction (P = 0.010) between the two cohorts. The second cohort comprised older participants with more risk factors for cognitive decline and lower baseline cognitive scores. Researchers concluded that hearing intervention may modestly slow cognitive decline over three years in high‑risk individuals but not in those at lower risk. No serious adverse events attributable to the intervention were reported.
Evidence grade: A
Sources: Lin FR, Pike JR, Albert MS, et al.; ACHIEVE Collaborative Research Group (2023). Hearing intervention versus health education control to reduce cognitive decline in older adults with hearing loss in the USA (ACHIEVE): a multicentre, randomised controlled trial. Lancet, 402(10404):786-797. <https://doi.org/10.1016/S0140-6736(23)01406-X>
Notes: Controversy: The oft‑quoted claim that “hearing aids cut cognitive decline by nearly half” stems from a subgroup analysis of this trial, not its primary result, which showed no overall difference. This note is included to separate the practical benefit of hearing aids from the unproven dementia‑prevention claim. Students with hearing impairments may be exempt from foreign‑language listening tests in college entrance exams; see item 13 (reasonable accommodations) in this section. Drivers with hearing loss should wear hearing aids; see item 15 (C5) in this section.
Source links
- Lin FR, Pike JR, Albert MS, et al.
- ACHIEVE Collaborative Research Group (2023). Hearing intervention versus health education control to reduce cognitive decline in older adults with hearing loss in the USA (ACHIEVE): a multicentre, randomised controlled trial. Lancet, 402(10404):786-797. ↗
- Pinned original chapter on GitHub ↗
Read the complete Chinese source and notes
17. 听力下降就去配助听器，配它的理由是听得见，不是防痴呆
成本: 助听器几千到几万元，多数要自费。要验配，还要来回调试几次。
说人话: 「戴助听器能防痴呆」这个说法目前没有立住。一项近千人的三年试验，总体上没有做出差别。只有在本来认知下降风险就偏高的那部分人里看到了差别。所以配助听器的理由是当下听得见、能和人说话、过马路能听见车，不是为了几十年以后的脑子。
收益: ACHIEVE 试验在美国 4 个社区做，纳入 977 名 70 到 84 岁、有未经治疗的听力损失、没有明显认知障碍的人。随机分成两组，一组接受听力干预（听力咨询和配助听器），一组接受健康教育对照，每 6 个月随访一次。主要终点是 3 年的整体认知评分变化。合并两个来源人群的主要分析里，两组没有显著差别：听力干预组 −0.200（95% CI −0.256 到 −0.144），对照组 −0.202（95% CI −0.258 到 −0.145），差值 0.002（95% CI −0.077 到 0.081），P=0.96。一项预设的敏感性分析显示，干预效果在两个来源人群之间存在差异（交互作用 P=0.010）。来自那项长期心血管健康观察研究的参与者年龄更大、认知下降的危险因素更多、基线认知分更低。研究者的结论是，听力干预可能在认知下降风险较高的人群里减少 3 年的认知变化，在风险较低的人群里则不能。试验没有报告归因于研究的严重不良事件
证据等级: A
来源: Lin FR, Pike JR, Albert MS, et al.; ACHIEVE Collaborative Research Group (2023). Hearing intervention versus health education control to reduce cognitive decline in older adults with hearing loss in the USA (ACHIEVE): a multicentre, randomised controlled trial. Lancet, 402(10404):786-797. <https://doi.org/10.1016/S0140-6736(23)01406-X>
备注: 争议：网上常见的「助听器让认知下降少了近一半」来自这项试验里的一个亚组，不是它的主要结果，主要结果是两组没有差别。「配助听器」和「防痴呆」要分开看：前者该做，后者别当成理由。听力残疾考生高考可以免外语听力，见本节第 13 条（合理便利）。有听力障碍的人开车应当佩戴助听设备，见本节第 15 条（C5）。
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