Duca P G, Ferri F, Merluzzi F, Paltrinieri M
Istituto di Statistica Medica e Biometria, Università degli Studi, Milano.
Med Lav. 1994 Mar-Apr;85(2):161-70.
Over the period 1980-1990, 2024 workers in ceramic plants in the Emilia-Romagna region, Italy were evaluated for exposure to noise and hearing loss. Data collected by the National Health Service Local of Occupational and Preventive Medicine Units were used. In a relatively young population (34.8 years mean age, 8.98 years s.d.) exposed for not too long to > 90 dBA noise levels (87.2 for less than 4 years) a statistically significant effect of exposure was found only on the audiometric frequency of 6 kHz (95% confidence interval for mean hearing loss for 1 year exposure to > 90 dBA: 0.05-0.72 dB). An initial isolated loss at the audiometric frequency of 6 kHz was found to be significantly associated with (was a prognostic indicator of) a subsequent impairment at 4 kHz.
在1980年至1990年期间，对意大利艾米利亚 - 罗马涅地区陶瓷厂的2024名工人进行了噪声暴露和听力损失评估。使用了国家卫生服务局职业与预防医学单位收集的数据。在一个相对年轻的人群中（平均年龄34.8岁，标准差8.98岁），暴露于> 90分贝A噪声水平的时间不长（暴露于87.2分贝A以下的时间少于4年），仅在6千赫的听力频率上发现暴露有统计学显著影响（暴露于> 90分贝A一年的平均听力损失的95%置信区间：0.05 - 0.72分贝）。发现在6千赫听力频率上最初的孤立损失与随后在4千赫的损伤显著相关（是其预后指标）。
