[Analysis of the extra-aural dependence of hearing disorders in civic flight personnel]

The correlation of incidence of hearing loss and concomitant pathologies in civil pilots with auditory analyzer sensitivity to aviation noise and length of service was investigated with the use of two-factor variance analysis w/o repetition. As a result of screening, 335 people (group-1) had only trace of audiometric noise impact; 108 people (group-2) displayed a sustained loss of hearing (chronic sensorineural hearing loss). In the aggregate, data of the investigation evidences that incidence of cardiovascular diseases (atherosclerosis of aorta and coronary arteries, atherosclerotic cardiosclerosis) and sensorineural hearing loss depend reliably on both individual sensitivity to noise and length of service. As for other pathologies, none of factorial criteria revealed itself as the categorical cause of a pathology. The significance and unit input of causative factor into health disorders vary as in type of non-auditory pathology, so length of flight service, and suggest linkage with the time of incipient loss of hearing. The flight personnel with low noise sensitivity and sustained deafness were diagnosed for a broader variety of extra-aural pathologies than the group with incipient hearing disorders. Variation analysis w/o repetition is applicable to evaluation of the risks of somatic pathologies in flight personnel.