Maccacaro G, Baratieri S, Princivalle A, Perbellini L
Servizio di Medicina del Lavoro, Via del Ronco 3, 38100 Bolzano.
G Ital Med Lav Ergon. 2007 Jul-Sep;29(3 Suppl):241-3.
This work describes the audiometry threshold assessment of 1000 workers employed in different artisan categories during a period of ten-year noise professional exposure. The hearing loss noise-induced rates were determined by analysing audiometric tests at the beginning of our period of study and after 5 and 10 years of noise exposure. Environmental noise exposures were on average 88 dB(A), but near 90 dB(A) in some work categories. Workers widely used hearing protection devices, nearly at 93%, during the period we studied. The Evidence Based Occupational Medicine should find out points of reference proving the efficiency and effectiveness of occupational physicians: in this case, a positive trend in the reduction of hearing loss rate will be expected to confirm the goodness of prevention practice. Our study suggests that the levels of protection so far accepted are not effective enough in order to reduce the incidence of noise-induced hearing loss in the course of the years: in despite of most accredited predicting models for hearing conservation programs, a significant percentage of workers exposed to industrial noise continues to present a high incidence of hearing loss. The Evidence Based Occupational Medicine suggests that the proposed prevention activities carried out in the described factories were not enough effective.
这项工作描述了在十年噪声职业暴露期间，对1000名从事不同工匠类别的工人进行的听力阈值评估。通过分析研究开始时以及噪声暴露5年和10年后的听力测试，确定了噪声性听力损失率。环境噪声暴露平均为88分贝(A)，但在某些工作类别中接近90分贝(A)。在我们研究期间，工人广泛使用听力保护装置，使用率接近93%。循证职业医学应找出能证明职业医生工作效率和效果的参考点：在这种情况下，听力损失率降低的积极趋势将有望证实预防措施的良好效果。我们的研究表明，目前公认的保护水平在多年来降低噪声性听力损失发生率方面不够有效：尽管听力保护计划有大多数认可的预测模型，但很大比例的工业噪声暴露工人仍有很高的听力损失发生率。循证职业医学表明，在所描述的工厂中开展的拟议预防活动不够有效。
