A Multilevel Intervention to Prevent Noise Exposure in Farmworkers
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 200
- 试验地点
- 1
- 主要终点
- Change in Time-Weighted Average Noise Exposure (dBA)
研究概览
简要总结
This study will test a program to reduce noise exposure and prevent hearing loss among farmworkers. Farmworkers are often exposed to high levels of noise from machinery, which can lead to hearing loss over time.
Farms will be randomly assigned to either receive the program or serve as a comparison group. The program includes a short educational video, group discussion, and hands-on training on how to use hearing protection (such as earplugs). Supervisors will also receive brief training on how to support hearing protection use in the workplace.
Participants will wear a small device (dosimeter) during a work shift to measure noise exposure before the program and again about one month later. Participants will also complete surveys about their knowledge, attitudes, and behaviors related to hearing protection.
A subset of participants will be invited to take part in interviews to understand barriers and facilitators to using hearing protection and implementing the program.
The results of this study will help inform future efforts to improve hearing health and reduce noise exposure in agricultural settings.
详细描述
This study is a cluster randomized controlled trial designed to evaluate a multilevel intervention to reduce occupational noise exposure among farmworkers. Farms will be recruited through community and industry partnerships and randomized in a 1:1 ratio to either the intervention or control condition. Randomization will occur at the farm level to minimize contamination.
The intervention includes both worker- and supervisor-level components. Farmworkers will participate in a training session consisting of a brief educational video on noise exposure and hearing loss, followed by group discussion and hands-on instruction on proper use of hearing protection. Supervisors will receive a brief training focused on identifying noise hazards, promoting hearing protection use, and supporting workplace-level safety practices.
Control sites will not receive the intervention during the study period but will be offered the program after study completion.
Primary outcomes include objective measures of noise exposure assessed using personal dosimeters worn during a full work shift at baseline and approximately one month post-intervention. Dosimeters measure time-weighted average noise exposure, noise dose, and peak sound levels and do not record audio.
Secondary outcomes include farmworker knowledge, attitudes, self-efficacy, and behaviors related to hearing protection, as well as supervisor-level outcomes related to supporting hearing safety. Worksite-level outcomes include availability of hearing protection and presence of noise hazard indicators.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Age 18 years or older
- •Currently employed as a farmworker or supervisor at a participating farm
- •Able to provide informed consent
- •Able to understand and communicate in Spanish or English
排除标准
- •Not currently working at a participating farm at the time of recruitment
- •Unable or unwilling to wear a personal noise dosimeter during a work shift
- •Unable to complete study procedures (e.g., surveys or training)
研究组 & 干预措施
Intervention Arm (Multilevel Intervention Group)
Participants at farms assigned to the intervention arm will receive a multilevel intervention that includes a brief educational video on noise exposure and hearing loss, group discussion, and hands-on training on proper use of hearing protection (e.g., earplugs). Supervisors will receive a brief training on identifying noise hazards and supporting hearing protection use among workers. The intervention is delivered in a community or workplace setting by trained study staff or community health workers.
干预措施: Multilevel Hearing Protection Training (Behavioral)
Control Arm (Usual Practice)
Participants at farms assigned to the control arm will not receive the intervention during the study period. They will complete study assessments, including dosimetry and surveys. The intervention will be offered after study completion.
结局指标
主要结局
Change in Time-Weighted Average Noise Exposure (dBA)
时间窗: Baseline and approximately 1 month post-intervention
Objective occupational noise exposure measured using personal dosimeters worn during a full work shift. The primary metric is time-weighted average (TWA) noise exposure in decibels (dBA), calculated using standard NIOSH criteria. Devices do not record audio, only noise levels.
Change in Noise Dose (%)
时间窗: Baseline and approximately 1 month post-intervention
Cumulative occupational noise exposure measured as percent noise dose using personal dosimeters worn during a full work shift, calculated using standard NIOSH criteria.
次要结局
- Change in Hearing Protection Beliefs and Attitudes(Baseline and approximately 1 month post-intervention)
- Acceptability of the Hearing Protection Training(Approximately 1 month post-intervention)
- Appropriateness of the Hearing Protection Training(Approximately 1 month post-intervention)
- Feasibility of the Hearing Protection Training(Approximately 1 month post-intervention)