Sleep-Associated Traits and Hearing Difficulties in Noise: A Bidirectional Mendelian Randomization Study.
Chunyan Liu, Xiaonan Wu, Jin Li and 3 others
PMID 39828915WHAT IT FOUND
Genetic data suggests sleeping less and dozing during the day may increase the risk of hearing difficulties in noise, while getting up easily in the morning may protect against them.
However, hearing difficulties in noise may also cause changes in sleep patterns and morning ease.
Key findings
01Genetically predicted shorter sleep duration and daytime dozing were associated with an increased risk of hearing difficulties in noise, whereas ease of getting up in the morning was associated with a decreased risk.
02In the reverse direction, genetically predicted hearing difficulties in noise were associated with changes in chronotype and reduced ease of getting up in the morning.
03Insomnia showed a significant causal association with increased risk of hearing difficulties in noise across African, South Asian, East Asian, and Greater Middle Eastern populations.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study relies on self-reported hearing difficulties and sleep traits from the UK Biobank, which may not perfectly align with objective clinical measurements. There was potential sample overlap in the genetic data, though the authors argue this was mitigated by strong genetic instruments. Findings in non-European populations were based on relaxed statistical thresholds and are considered exploratory. Mendelian randomization assumes genetic variants affect the outcome only through the exposure, but horizontal pleiotropy (where genes affect multiple traits independently) could still bias results. The study used aggregate data, preventing adjustment for individual confounders like age and gender.
Declared interests
The study was funded by the National Natural Science Foundation of China. No other conflicts of interest were reported in the provided text.
The easy way to misread this
Do not interpret these genetic associations as proof that changing sleep habits will directly improve or worsen hearing difficulties in noise. The study identifies potential causal pathways using genetic proxies, but it does not test behavioral interventions or clinical outcomes in patients.