目的探讨噪声性听力损失的易感、耐受人群筛选方法,为今后研究提供帮助。方法选择噪声暴露强度在75—120dB范围内的企业噪声作业工人为研究对象。进行现场职业卫生学调查、收集工人基本情况和工人听阈水平检测的资料,采用国内外筛选噪声性易感和耐受人群的3种方法,判断不同方法在筛选易感人群和耐受人群的情况。通过配对X2检验做两两比较,并且对样本的噪声暴露情况、一般情况的均衡性以及噪声性听阈位移情况为依据,判断哪种方法更好。结果各个方法筛选出来的易感人群和耐受人群的噪声暴露情况,基本情况,左右耳听阈水平都有较好的均衡性,配对X2检验发现两两之间差异无统计学意义(P〉0.05)。但从专业的角度比较,各数值间存在较多错配情况,高频听阈情况有统计学差异,方法B和方法C结果较为相近且优于方法A。结论现今我国工人年轻化,自我保护意识加强,个体防护措施做的较之前有很大的提高,采用方法B更适合作为我国现阶段噪声性听力损失人群的特征。
Objective To investigate the screening methods for identifying the populations susceptible and resistant to noise-induced hearing loss (NIHL) and to provide a reference for future research. Methods Workers who were exposed to 75-120 dB noise in enterprises were included in the study. Field investigation of occupational health was conducted; workers' basic information and data on hearing threshold levels were collected. Paired chi-square test was used to compare each two of three screening methods, which were used at home and abroad to identify noise-susceptible and noise-sensitive populations, in terms of noise exposure level, general information, and noise-induced hearing threshold shift. Results There were no significant differences in the noise exposure level, basic information, and left and right ears' hearing threshold levels of noise- susceptible and noise-sensitive populations between each two of the three screening methods (/〉〉0.05), according to the paired chi-square test. However, high-frequency hearing threshold had statistically significant difference among the three methods. As a whole, methods B and C were superior to method A. Conclusion The workers in China are younger than before, with more awareness of self-protection, and individual protection is enhanced in them. Currently. method B is more suitable for screeninz out the population susceotible to NIHL in China.