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首页> 外文期刊>Preventive Medicine: An International Journal Devoted to Practice and Theory >Hearing conservation program for agricultural students: short-term outcomes from a cluster-randomized trial with planned long-term follow-up.
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Hearing conservation program for agricultural students: short-term outcomes from a cluster-randomized trial with planned long-term follow-up.

机译：听力农业学生保护计划：与计划长期随访的集群随机审判短期成果。

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OBJECTIVES: (1) To conduct a contemporary analysis of historical data on short-term efficacy of a 3-year hearing conservation program conducted from 1992 to 1996 in Wisconsin, USA, with 753 high school students actively involved in farm work; (2) to establish procedures for assessment of hearing loss for use in a recently funded follow-up of this same hearing conservation program cohort. METHODS: We analyzed a pragmatic cluster-randomized controlled trial, with schools as the unit of randomization. Thirty-four rural schools were recruited and randomized to intervention or control. The intervention included classroom instruction, distribution of hearing protection devices, direct mailings, noise level assessments, and yearly audiometric testing. The control group received the audiometric testing. RESULTS: Students exposed to the hearing conservation program reported more frequent use of hearing protection devices, but there was no evidence of reduced levels of noise-induced hearing loss (NIHL). CONCLUSION: Our analysis suggests that, since NIHL is cumulative, a 3-year study was likely not long enough to evaluate the efficacy of this intervention. While improvements in reported use of hearing protection devices were noted, the lasting impact of these behaviors is unknown and the finding merits corroboration by longer term objective hearing tests. A follow-up study of the cohort has recently been started.
机译：目标：（1）对1992年至1996年威斯康星州威斯康星州的3年度听力保护计划的短期疗效进行了当代分析，其中753名高中生积极参与农场工作; （2）建立评估听力亏损的程序，以便在最近资助的同一听证会保护计划队列的最近资助后续行动。方法：我们分析了一个务实的聚类随机对照试验，学校作为随机化单位。招募了三十四所农村学校，并随机进行干预或控制。干预包括课堂教学，听力保护装置的分发，直接邮件，噪声水平评估和年鉴测试。对照组接收了听力测量测试。结果：接触听力保护计划的学生报告更多地使用听力保护装置，但没有证据表明噪声引起的听力损失（NIHL）水平降低。结论：我们的分析表明，由于NIHL累积，3年的研究可能不足以评估这种干预的疗效。虽然指出报告使用听力保护装置的改进，但是这些行为的持久影响是未知的，并且通过长期客观听力测试来查找优异符合。最近已经开始了对队列的后续研究。

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