Blood Group O and its Potential Association with Sensorineural Hearing Loss
Brajpal Tyagi* and Manika Feotia
Department of ENT, Harsh ENT Hospital, India
*Corresponding Author: Brajpal Tyagi, Department of ENT, Harsh ENT Hospital, India.
February 13, 2023; Published: April 13, 2023
Introduction: ABO blood group system and auditory function has been linked in the past. Individuals with O blood type are at a higher risk to develop noise induced hearing loss after industrial noise exposure. Also, O positive healthy individuals with normal hearing show reduced amplitudes in otoacoustic emission recordings. Whether blood group status increases the susceptibility of an individual with O blood group to develop sensorineural hearing loss or increases its severity is unclear.
Aim/Objectives: To analyse the association of O type blood group with sensorineural hearing loss.
Materials and Methods: 257 patients with SNHL were divided into group 1 (>7yrs) and group 2(<7yrs). Blood group analysis was carried out. Bera (group 1) and pure tone audiometry (group 2) were done in all patients. Chi square tests compared results across the ABO groups.
Results: On blood group analysis, blood group O (39.7%) was most commonly encountered. In both the groups O positive blood type had majority of the patients with severe degree of hearing loss with minimal cases falling into milder form. A statistically significant difference in the degree of hearing loss across the four ABO blood groups was found.
Conclusion: There was an increased incidence and severity of sensorineural hearing loss in patients with O positive blood group in both adults and children.
Keywords: WHO; Hearing; Sensorineural Hearing Loss (SNHL)
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