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Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
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Association between depression and sleep apnoea: a Mendelian randomisation study.

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Major depressive disorder (MDD) may causally increase the risk of developing sleep apnoea. This genetic study found a slight but significant link, suggesting depression could be a contributing factor to sleep apnoea aetiology.

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Area of Science:

  • Psychiatry
  • Sleep Medicine
  • Genetics

Background:

  • A strong association exists between depression and sleep apnoea.
  • Causal relationship between depression and sleep apnoea remains unclear.

Purpose of the Study:

  • To investigate if depression is causally linked to the aetiology of sleep apnoea.

Main Methods:

  • Utilized genetic summary data from the Psychiatric Genomics Consortium and UK Biobank.
  • Employed Mendelian randomisation (MR) analysis with inverse-variance weighted, MR-Egger, and weighted median methods.
  • Analyzed 36 single-nucleotide polymorphisms (SNPs) associated with major depressive disorder (MDD).

Main Results:

  • Found statistically significant evidence suggesting a causal effect of MDD on sleep apnoea risk (OR 1.004, p=0.001).
  • Results were consistent across different MR analysis methods.
  • Confirmed no significant heterogeneity or pleiotropy in the analyses.

Conclusions:

  • Depression appears to slightly elevate the risk of developing sleep apnoea.
  • Further research into the underlying biological mechanisms is warranted.