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Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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Polygenic Risk Scores and Hearing Loss Phenotypes in Children.

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Summary
This summary is machine-generated.

A polygenic risk score (PRS) for adult hearing loss is linked to childhood hearing loss across all severities. This genetic factor contributes to understanding hearing variations in children, even with other influences.

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Area of Science:

  • Genetics
  • Otolaryngology
  • Pediatrics

Background:

  • Monogenic causes of childhood hearing loss are known.
  • Polygenic risk scores (PRS) are established contributors to age-related hearing loss.
  • The role of PRS in childhood hearing loss remains largely unexplored.

Purpose of the Study:

  • To investigate the association between a PRS for adult hearing loss and various childhood hearing loss phenotypes.
  • To determine if PRS contributes to the spectrum of childhood hearing loss, from normal to profound.

Main Methods:

  • Utilized a cross-sectional study design combining two Australian population cohorts: Child Health CheckPoint and VicCHILD.
  • Generated genotype data from DNA samples.
  • Calculated PRS based on UK Biobank GWAS data for adult hearing difficulty; analyzed associations with childhood hearing outcomes (laterality, severity, type) using multinominal logistic regressions.

Main Results:

  • A 1-SD increase in PRS was significantly associated with higher odds of unilateral hearing loss across all severity levels (mild, moderate, severe or worse).
  • The PRS was also linked to increased odds of bilateral hearing loss and all hearing loss types.
  • The PRS explained a portion of the variation in hearing phenotypes, even when considering shared genetic and environmental factors like preterm birth.

Conclusions:

  • A PRS developed for adult hearing difficulty is associated with a broad range of childhood hearing loss phenotypes.
  • PRS may contribute to the variability observed in childhood hearing loss, independent of or in conjunction with other factors.
  • Further large-scale studies with objective hearing assessments are needed to refine PRS and identify children at high risk for hearing loss.