Investigation on the status of hearing loss and its influencing factors in civilian pilots

doi:10.3969/j.issn.1006-7795.2018.06.028

Abstract

Abstract: Objective Study on the status of hearing loss and its influencing factors in civilian pilots subjects. Methods The medical data of 1 423 pilots who were diagnosed as "hearing loss" by Civil Aviation Administration of China(CAAC) class Ⅰ physical examination was adopted in cluster sampling. The air-conduction threshold between ears and frequencies were compared and the types and severity of hearing loss were analyzed. The total flight time was taken as independent variable, and the speech and high frequency thresholds were used as dependent variables for curve fitting, respectively. Results Island-like shape hearing loss (Group A):496 cases(34.86%),high frequency hearing loss (Group B):523 cases(36.75%), speech frequency hearing loss (Group C):67 cases(4.71%),full frequency hearing loss (Group D):337 cases(23.68%). There were 2 severe, 7 moderate, 217 mild hearing loss in left and 5 severe, 12 moderate, 220 mild hearing loss in right; 6 000 Hz hearing loss was the most significant; Group D subjects was the oldest and had the longest total flying time. Multiple comparisons showed that the values of high density lipoprotein-cholesterol (HDL-C) in group D and group C were relatively low. The slope of high frequency thresholds fitting curve was much steeper. Conclusion The overall hearing level of the subjects was high, hearing loss was the severest at 6 000 Hz and related to age and ambient noise. HDL-C may be a protective factor for auditory function. It is necessary to carry out multidisciplinary collaborative prevention for pilot population.

Key words: pilots, hearing loss, eligibility determination, preventive medicine, interdisciplinary research

CLC Number:

R856.76

Hu Mosheng, Zhang Hua, Wang Lei, Yang Xiuyun, Ma Fengjie, Qin Caihong, Bai Yin. Investigation on the status of hearing loss and its influencing factors in civilian pilots[J]. Journal of Capital Medical University, 2018, 39(6): 955-960.

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URL: https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/10.3969/j.issn.1006-7795.2018.06.028

https://journal03.magtech.org.cn/Jweb_sdykdxxb/EN/Y2018/V39/I6/955

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