School of Nursing, University of California San Francisco, San Francisco, California 94143-0608, USA.
Am J Ind Med. 2013 Feb;56(2):258-66. doi: 10.1002/ajim.22091. Epub 2012 Jul 5.
Booster interventions may be useful in promoting workers' hearing protection device (HPD) use. Previous research on the effectiveness and the optimal timeframe for boosters is limited and inconsistent.
In this randomized controlled trial, 403 workers were assigned to receive an individually tailored booster, a control booster, or no booster. The booster intervention groups were further divided by timeframe. Frequency of HPD use was measured 12 months post-intervention.
The booster intervention groups significantly accounted for the variance in HPD use in Year 2. Workers in middle-term booster (67-94 days) group reported a significantly greater increase in HPD use in Year 2 than those in other timeframes, when potential covariates were controlled for.
Booster intervention letters mailed between 67 and 94 days post-initial intervention may promote HPD use among participants. Future research should explore additional factors associated with optimal booster design, including more innovative mobile and internet-based approaches.
强化干预措施可能有助于促进工人使用听力保护装置（HPD）。先前关于强化干预措施的有效性和最佳时间框架的研究有限且不一致。
在这项随机对照试验中，403 名工人被分配接受个性化强化干预、对照强化干预或不接受强化干预。强化干预组进一步按时间框架进行划分。在干预后 12 个月测量 HPD 的使用频率。
强化干预组在第二年显著解释了 HPD 使用的变化。在控制了潜在协变量的情况下，与其他时间框架相比，中期强化（67-94 天）组的工人在第二年 HPD 使用的增加幅度显著更大。
在初始干预后 67 至 94 天之间邮寄的强化干预信可能会促进参与者使用 HPD。未来的研究应探索与最佳强化设计相关的其他因素，包括更具创新性的移动和互联网方法。
