Investigation of the High Frequency Hearing in an Aviation College
LI Jia
ZHANG Honglei
LI Dapeng
CAI Qing
GONG Weixi
LI Li
LI Ping
Li Juan
Zheng Wei
DONG Jing
GUO Rui
Abstract：Objective To track high frequency hearing changes among pilot cadets in an aviation school over consecu-tive two years and investigate the relationship between mitochondrial DNA (mtDNA) 4977 bp deletion and noise induced hear-ing loss. Methods One hundred and forty pilot students from Class 2008 in an aviation college were random included. Their hearing was followed for contiguous two years, with focus on high frequencies (4000, 6000 and 8000 Hz) and cumulative chang-es in high frequency hearing. Those with abnormal audiology results were tested for mtDNA4977 deletion. The SPSS 19.0 sta-tistics software was used for statistical analysis, with t-test being used to compare differences and chi square test to detect fre-quency of gene deletion in normal and abnormal hearing groups. Results There was change only at 4000 Hz in right ear (p<0.05) in senior pilot cadets over the two years. The rate of mtDNA4977 deletion differed among the normal and abnormal hear-ing groups (p<0.05). Conclusions Senior years pilot cadets are prone to have noise hearing loss and mtDNA4977 deletion may be a risk factor for noise induced hearing loss.
Keywords：Pilot cadetsHigh frequency hearingDNAMitochondrionGeneNoiseOccupational
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 109-111 )