Influencing factors for hearing loss in workers exposed to noise in a cement plant
Author(s): Wang Xingming, Wu Hui, Jiao Jie, Li Yanhong, Zhang Zengrui, Zhou Wenhui, Yu Shanfa
Pages: 895-899
Year: 2016 Issue: 12
Journal: Chinese Journal of Industrial Hygiene and Occupational Diseases
Keyword: Noise; occupational; Hearing loss; Cumulative noise exposure; Hyperlipidemia;
Abstract: Objective To investigate the incidence of noise-induced hearing loss (NIHL) and related influencing factors in workers exposed to noise in a cement plant.Methods In October 2015,cluster sampling was used for questionnaire investigation and health examination of workers exposed to noise in a cement plant in Henan Province,China.The association of demographic features,living habits,cumulative noise exposure (CNE),hypertension,and hyperlipidemia with NIHL was analyzed.Results There was mainly medium-or high-frequency noise in the working place of this cement plant.The prevalence rate of NIHL was 18.4％,and male workers had a significantly higher prevalence rate than female workers (x2=28.09,P＜0.01).The prevalence rate of NIHL increased with the increasing age (x2trend=25.54,P＜0.01) and decreasedwith the increasing degree of education(x2trend=8.55,P＜0.01).The workers who smoked had a significantly higher prevalence rate of NIHL than those who did not smoke (x2=14.15,P＜0.01),and the workers with a drinking habit had a significantly higher prevalence rate of NIHL than those without such habit(x2=7.95,P＜0.01).The workers who did not wear earplugs had a significantly higher prevalence rate of NIHL than those who wore earplugs (x2=19.93,P＜0.01).The prevalence rate of NIHL increased with the increasing CNE (xtrend =57.81,P＜0.01).The workers with hyperlipidemiahad a significantly higher prevalence rate of NIHL than those without hyperlipidemia (x2=12.43,P＜0.01).The multivariate logistic regression analysis showed that male sex (OR=5.06,95％CI 1.68-15.26),age ≥ 50 years (OR=1.91,95％CI 1.12-3.27),CNE 97.01-103 dB (A)· year(OR=16.10,95％CI 4.65-55.69),CNE 103.01-118.37dB (A)· year(OR=20.27,95％CI 5.14-79.92),and hyperlipidemia (OR=2.83,95％CI 1.25-6.43)were risk factors for N1HL,while high school education (OR=0.22,95％CI 0.09-0.56),junior college diploma (OR=0.16,95％CI 0.41-0.59),and use of earplugs (OR=0.36,95％CI 0.19～0.71) were protective factors against NIHL.Conclusion The workers in a cement plant have a high prevalence rate of NIHL,and CNE,sex,age,degree of education,use of earplugs,and hyperlipidemia may be influencing factors for NIHL.
Pages: 895-899
Year: 2016 Issue: 12
Journal: Chinese Journal of Industrial Hygiene and Occupational Diseases
Keyword: Noise; occupational; Hearing loss; Cumulative noise exposure; Hyperlipidemia;
Abstract: Objective To investigate the incidence of noise-induced hearing loss (NIHL) and related influencing factors in workers exposed to noise in a cement plant.Methods In October 2015,cluster sampling was used for questionnaire investigation and health examination of workers exposed to noise in a cement plant in Henan Province,China.The association of demographic features,living habits,cumulative noise exposure (CNE),hypertension,and hyperlipidemia with NIHL was analyzed.Results There was mainly medium-or high-frequency noise in the working place of this cement plant.The prevalence rate of NIHL was 18.4％,and male workers had a significantly higher prevalence rate than female workers (x2=28.09,P＜0.01).The prevalence rate of NIHL increased with the increasing age (x2trend=25.54,P＜0.01) and decreasedwith the increasing degree of education(x2trend=8.55,P＜0.01).The workers who smoked had a significantly higher prevalence rate of NIHL than those who did not smoke (x2=14.15,P＜0.01),and the workers with a drinking habit had a significantly higher prevalence rate of NIHL than those without such habit(x2=7.95,P＜0.01).The workers who did not wear earplugs had a significantly higher prevalence rate of NIHL than those who wore earplugs (x2=19.93,P＜0.01).The prevalence rate of NIHL increased with the increasing CNE (xtrend =57.81,P＜0.01).The workers with hyperlipidemiahad a significantly higher prevalence rate of NIHL than those without hyperlipidemia (x2=12.43,P＜0.01).The multivariate logistic regression analysis showed that male sex (OR=5.06,95％CI 1.68-15.26),age ≥ 50 years (OR=1.91,95％CI 1.12-3.27),CNE 97.01-103 dB (A)· year(OR=16.10,95％CI 4.65-55.69),CNE 103.01-118.37dB (A)· year(OR=20.27,95％CI 5.14-79.92),and hyperlipidemia (OR=2.83,95％CI 1.25-6.43)were risk factors for N1HL,while high school education (OR=0.22,95％CI 0.09-0.56),junior college diploma (OR=0.16,95％CI 0.41-0.59),and use of earplugs (OR=0.36,95％CI 0.19～0.71) were protective factors against NIHL.Conclusion The workers in a cement plant have a high prevalence rate of NIHL,and CNE,sex,age,degree of education,use of earplugs,and hyperlipidemia may be influencing factors for NIHL.
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