Clinical Unit of Occupational Medicine, Department of Medical Sciences, University of Trieste, Via della Pietà 2/2, 34129, Trieste, Italy.
Physical Agents, Public Health Lab, Local Health Authority Toscana Sud Est, NHS, Strada di Ruffolo, 53100, Siena, Italy.
Int Arch Occup Environ Health. 2019 Jan;92(1):129-139. doi: 10.1007/s00420-018-1363-y. Epub 2018 Oct 1.
To provide an updated epidemiological validation for a supplementary method for assessing the risk of vascular disorders from hand-transmitted vibration.
The occurrence of vibration-induced white finger (VWF) in the vibration-exposed workers of the Italian cohort of the EU VIBRISKS study was related to measures of daily vibration exposure expressed in terms of r.m.s. acceleration magnitude normalised to an 8-h day, frequency weighted according to either the frequency weighting W defined in international standard ISO 5349-1:2001 [A(8) in ms] or the hand-arm vascular frequency weighting W proposed in the ISO technical report (TR) 18570:2017 [A(8) in ms]. To estimate a threshold value for vascular hand-arm vibration risk, the W-weighted vibration exposure value E (in ms) was calculated according to the ISO/TR document. The difference in the predictions of VWF between the exposure measures calculated with the frequency weightings W or W was investigated by means of logistic modelling.
Measures of daily vibration exposure constructed with the frequency weighting W [A(8) and E], which gives more importance to intermediate- and high-frequency vibration, were better predictors of the occurrence of VWF in the vibration-exposed workers than the metric derived from the conventional ISO frequency weighting W [A(8)]. There was some epidemiological evidence for a threshold value of E for the onset of VWF in the vibration-exposed workers.
Measures of daily vibration exposure evaluated with the vascular weighting W performed better for the predictions of VWF than those obtained with the frequency weighting W recommended in ISO 5349-1.
为评估手部传递振动导致血管疾病风险的补充方法提供最新的流行病学验证。
将意大利 EU VIBRISKS 研究队列中暴露于振动的工人中振动诱发白指（VWF）的发生与每日振动暴露的测量值相关联，这些测量值以均方根加速度幅度表示，并根据国际标准 ISO 5349-1:2001 中定义的频率加权 W（A(8) in ms）或 ISO 技术报告（TR）18570:2017 中提出的手部-手臂血管频率加权 W（A(8) in ms）进行频率加权。为了估计血管性手部-手臂振动风险的阈值值，根据 ISO/TR 文件计算加权振动暴露值 E（in ms）。通过逻辑回归模型研究了使用频率加权 W 或 W 计算的暴露测量值对 VWF 发生的预测差异。
使用频率加权 W [A(8)和 E]构建的每日振动暴露测量值，更重视中高频振动，比传统 ISO 频率加权 W 得出的指标更好地预测了振动暴露工人中 VWF 的发生。对于振动暴露工人中 VWF 的发生，E 存在一些与阈值相关的流行病学证据。
使用血管加权 W 评估的每日振动暴露测量值在预测 VWF 方面优于 ISO 5349-1 推荐的频率加权 W 获得的测量值。
