OBJECTIVE Explore the influencing factors of hearing loss among workers exposed to noise.METHODS A total of 167 noise exposure practitioners undergoing hearing testing in Hangzhou Occupational Disease Prevention and Treatment Center from January 2022 to December 2023 were selected to perform hearing testing on the left and right ears of the patients.Based on the test results,the patients were divided into 123 hearing loss patients(loss group)and 44 non hearing loss patients(control group).The population characteristics,laboratory indicators,noise exposure,and other indicators of the two groups were compared.Logistic regression models were used to analyze the risk factors for hearing loss in noise exposed workers.RESULTS In the 2 000,3 000,4 000,and 6 000 Hz air conduction hearing threshold tests,the hearing threshold of the right side of the loss group patients was higher than that of the control group.In the 500,1 000,2 000,3 000,4 000,and 6 000 Hz air conduction hearing threshold tests,the hearing threshold of the left side of the loss group patients was higher than that of the control group,and the differences were statistically significant(P<0.05).The age of patients in the loss group,the proportion of patients with concurrent chronic diseases,and the proportion of patients with junior high school education or below were all significantly different from those in the control group,and the differences were statistically significant(P<0.05).The length of service and the proportion of patients with liver function loss in the loss group were significantly higher than those in the control group.The proportion of noise protection patients and those who frequently use noise protection equipment in the loss group were significantly lower than those in the control group,and the differences were statistically significant(P<0.05).The results of the Logistic regression model showed that older age,comorbidities with chronic diseases,longer working experience,lack of noise protection,and occasional or never use of noise protection equipment were independent risk factors for hearing loss in noise exposed workers(P<0.05).CONCLUSION There are many factors that can affect the occurrence of hearing loss among workers exposed to noise.Targeted preventive interventions based on high-risk factors can reduce the risk of hearing loss in the population.

OBJECTIVE To explore the clinical practice differences based on GBZ 49-2007 and GBZ 49-2014 diagnostic criteria for occupational noise induced hearing loss.METHODS Two hundred and sixty-five noise workers who applied for occupational noise induced hearing loss diagnosis in Hangzhou Occupational Disease Prevention and Treatment Center from January 2016 to November 2023 were selected and diagnosed according to the diagnostic criteria of GBZ 49-2007 and GBZ 49-2014 for noise induced hearing loss.RESULTS The diagnostic rate of occupational noise induced hearing loss in GBZ 49-2014 standard was 53.58%,which was significantly higher than the 42.64%in GBZ 49-2007 standard(P<0.05).The κ value of the diagnostic consistency between the GBZ 49-2014 standard and the GBZ 49-2007 standard for occupational noise induced hearing loss was 0.761,P<0.05,indicating good diagnostic consistency with a diagnostic consistency rate was 86.04%.The diagnostic rate of occupational noise induced hearing loss(GBZ 49-2007)among workers with work experience≥10 years was 59.05%,which was higher than that of workers with work experience<10 years(P<0.05).The diagnostic rate of occupational noise induced deafness in workers with work experience≥10 years(GBZ 49-2014)was 72.38%,which is higher than that of workers with work experience<10 years(P<0.05).According to the diagnosis of occupational noise induced hearing loss in GBZ 49-2007 and GBZ 49-2014,patients with work experience≥10 years had a higher severity of occupational noise induced hearing loss than those with work experience<10 years(P<0.05).CONCLUSION Compared to the GBZ 49-2007 standard,the GBZ 49-2014 standard will increase the diagnostic cases of occupational noise induced hearing loss;Under the GBZ 49-2007 and GBZ 49-2014 standards,the diagnosis and severity of occupational noise induced hearing loss are related to length of service.