Aetiology of bilateral sensori-neural deafness in children

Area of Science:

• Pediatrics
• Genetics
• Epidemiology

Background:

• Childhood deafness presents significant challenges.
• Identifying etiological factors is crucial for intervention.
• Previous studies have explored various causes of congenital hearing impairment.

Purpose of the Study:

• To investigate the etiological factors of deafness in children born in Greater Manchester between 1981-1984.
• To determine the prevalence of different causes, including family history, perinatal factors, congenital infections, meningitis, and chromosomal abnormalities.
• To establish a baseline for understanding the origins of hearing loss in this cohort.

Main Methods:

• Retrospective investigation of 155 children diagnosed with deafness.
• Collection of family histories, including parental and sibling hearing status.
• Perinatal assessments conducted with pediatricians to identify adverse factors.
• Investigation for congenital infections and chromosomal abnormalities.

Main Results:

• A significant proportion (35.5%) of cases had no known cause or positive family history.
• Positive family history of deafness was identified in 18.7% of cases.
• Adverse perinatal factors accounted for 15.5% of cases.
• Congenital infections caused deafness in 10.3% of cases.
• Meningitis and chromosomal abnormalities were identified as etiological factors in 6.5% and 3.8% of cases, respectively.

Conclusions:

• The etiology of childhood deafness is multifactorial, with a substantial percentage of cases remaining unexplained.
• Family history, perinatal complications, congenital infections, meningitis, and chromosomal abnormalities are significant contributors to childhood hearing loss.
• Further research is needed to elucidate the causes of idiopathic deafness in children.