Case-control Study On The Influencing Factor To Hearing Impairment Of Middle-aged And Old Person In Taiyuan

Objects: To explore influencing factors of hearing impairment and provided scientific basis for hearing protection . Arial Rounded MT BoldMethods: 844 cases who over the age of 40 were collected in Chaobei communities, Tiebei community, Jianbei communities and Laojunying community four communities of Taiyuan by a random cluster sampling method. To test 0.5kHz, 1kHz,2kHz,3kHz and 4kHz frequency in the sound insulation indoor by the American FONIX-FA-18 audiometer. Conventional removal of the external auditory canal Cerumen subjects, the situation otoscopy tympanic membrane. Get a better ear 0.5kHz, 1kHz, 2kHz and 4kHz average hearing threshold as the average hearing threshold. Take the average hearing threshold≥40dB as case,Take the average hearing threshold<40dB as control。Assure the age and the sex is harmonious in case and control. Investigation①Ordinary circumstances: Including height, body weight, marital status, occupation, years of schooling, month income and so on;②Environmental factor: Working noise, environment and so on;③Habits and customs: Including smoking, drinking, taking part in the activity, chating frequently and so on;④Special factor exposited history: Strong noise exposure history, otoxicity medicine contact history and so on;⑤Formerly medical history: high fever relief governance, tympanitis medical history, the ear mechanical wound history, the brain mechanical wound history;⑥Hypertension, high blood fats, hyperglycemia, cerebral thrombus, coronary disease, family history and so on. SPSS13.0 conducted using statistical software to describe the general situation, single-factor analysis and multi-factor Logistic Regression.Results:1. Single factor analysis(1) The relationship between general characteristics and hearing impairment.1) Cultural level is dangerous to hearing impairment,it affects middil-frequency.2) Occupation is dangerous to hearing impairment,it affects high-frequency.(2)The relationship between the impact factors and hearing impairment1)Working noise is dangerous to hearing impairment, it affects whole-frequency.2)Power noise is dangerous to hearing impairment, it affects high-frequency.3)Ears mechanical wound is dangerous to hearing impairment, it affects middle-frequency.4)Otoxicity medicine is dangerous to hearing impairment, it affects high-frequency.5)tympanitis history operating noise and ear mechanical wound it affects high-frequency. 6)Pick ears is dangerous to hearing impairment, it affects middle-frequency.7)Hypertension is dangerous to hearing impairment, it affects high-frequency.8)Drinking is dangerous to hearing impairment, it affects high-frequency.9)Smoking is dangerous to hearing impairment, it affects high-frequency.2.The multi-factor analysis1) There are four factors affects the average audibility threshold: age, operating noise and ear mechanical wound;2) There are three factors affects the 0.5kHz audibility threshold :sex, age and perating noise;3) There are four factors affects the 4kHz audibility threshold: age, operating noise, tympanitis history and smoking.Conclusion:1) There are four factors affects the average audibility threshold: age, operating noise and ear mechanical wound; low-aged is protection to hearing impairment, operating noise and ear mechanical wound are dangerous to hearing impairment.2) There are four factors affects the 0.5kHz audibility threshold:sex, age and perating noise. low-aged and male are protection to hearing impairment;ear mechanical wound,operating noise and female are dangerous to hearing impairment.3) There are four factors affects the 4kHz audibility threshold: age, operating noise, tympanitis history and smoking. low-aged is protection to hearing impairment, operating noise, tympanitis history and smoking are dangerous to hearing impairment.