Clinical Unit of Occupational Medicine, Department of Reproductive, Developmental and Public Health Sciences, University of Trieste, Centro Tumori, Via della Pieta 19, I-34129 Trieste, Italy.
Ind Health. 2010;48(5):584-95. doi: 10.2486/indhealth.mswbvi-02.
The aim of this study was to investigate the relation between low back pain (LBP) outcomes and measures of daily exposure to whole-body vibration (WBV) in professional drivers. In a study population of 202 male drivers, who were not affected with LBP at the initial survey, LBP in terms of duration, intensity, and disability was investigated over a two-year follow-up period. Vibration measurements were made on representative samples of machines and vehicles. The following measures of daily WBV exposure were obtained: (i) 8-h energy-equivalent frequency-weighted acceleration (highest axis), A(8)(max) in ms(-2) r.m.s.; (ii) A(8)(sum) (root-sum-of-squares) in ms(-2) r.m.s.; (iii) Vibration Dose Value (highest axis), VDV(max) in ms(-1.75); (iv) VDV(sum) (root-sum-of-quads) in ms(-1.75). The cumulative incidence of LBP over the follow-up period was 38.6%. The incidence of high pain intensity and severe disability was 16.8 and 14.4%, respectively. After adjustment for several confounders, VDV(max) or VDV(sum) gave better predictions of LBP outcomes over time than A(8)(max) or A(8)(sum), respectively. Poor predictions were obtained with A(8)(max), which is the currently preferred measure of daily WBV exposure in European countries. In multivariate data analysis, physical work load was a significant predictor of LBP outcomes over the follow-up period. Perceived psychosocial work environment was not associated with LBP.
本研究旨在探讨职业驾驶员的下背痛（LBP）结局与全身振动（WBV）日暴露量之间的关系。在一项 202 名男性驾驶员的研究人群中，他们在初始调查时没有受到 LBP 的影响，在两年的随访期间，调查了 LBP 的持续时间、强度和残疾程度。对代表性的机器和车辆样本进行了振动测量。获得了以下日 WBV 暴露量的措施：（i）8 小时能量等效频率加权加速度（最高轴），A(8)(max)，ms(-2) r.m.s.；（ii）A(8)(sum)（均方根平方和），ms(-2) r.m.s.；（iii）振动剂量值（最高轴），VDV(max)，ms(-1.75)；（iv）VDV(sum)（均方根四平方和），ms(-1.75)。随访期间 LBP 的累积发生率为 38.6%。高疼痛强度和严重残疾的发生率分别为 16.8%和 14.4%。在调整了几个混杂因素后，VDV(max)或 VDV(sum)分别比 A(8)(max)或 A(8)(sum)更好地预测 LBP 结局随时间的变化。A(8)(max)的预测效果较差，A(8)(max)是目前欧洲国家首选的日 WBV 暴露量测量方法。在多变量数据分析中，体力工作负荷是随访期间 LBP 结局的一个重要预测因素。感知到的心理社会工作环境与 LBP 无关。
