Mirbod S M, Yoshida H, Jamali M, Masamura K, Inaba R, Iwata H
Department of Hygiene, Gifu University School of Medicine, Japan.
Int Arch Occup Environ Health. 1997;70(1):22-8. doi: 10.1007/s004200050182.
The aims of this study were (1) to evaluate subjective symptoms in the hand-arm system of all traffic police motorcyclists of a city located in the central part of Japan and (2) to assess their hand-arm vibration exposure associated with traffic police motorcycle riding. The study population consisted of 119 motorcycling traffic policemen and 49 male controls. By means of a questionnaire, information on the occupational history and the presence of subjective symptoms in the hand-arm system of all subjects was obtained. Vibration was measured on the handlebars of the representative motorcycles and on the hands of the riders. The 4- and 8-h energy-equivalent frequency-weighted acceleration as well as the lifetime vibration dose were calculated for all police motorcyclists. The prevalence of finger blanching in the traffic police motorcyclists was 4.2%, but none of the controls had this symptom. The rates of finger numbness (19.3%), finger stiffness (16.0%), shoulder pain (13.4%), and shoulder stiffness (45.4%) were significantly higher among police motorcyclists as compared with controls. The root-mean-square (rms) frequency-weighted acceleration on the handlebars of police motorcycles was in the range of 2.2-4.9 m/s2 rms. The computed 4- and 8-h energy-equivalent frequency-weighted acceleration values were 2.8-4.5 and 2.0-3.2 m/s2 rms, respectively. A pattern of increasing percentage prevalence with increasing cumulative vibration dose was noticed. The subjects with a lifetime vibration dose of more than 20.1 m2 h3 s-4 (in scale) showed significantly higher prevalence rates for symptoms in the fingers and shoulders as compared with the control group. As occupational vibration exposure of traffic police motorcyclists might be considered a risk factor for the development of symptoms in the hand-arm system of the riders, its evaluation and control is needed for prevention methodology evolution.
（1）评估日本中部某城市所有骑警摩托车手的手臂系统主观症状；（2）评估他们与骑警摩托车相关的手臂振动暴露情况。研究对象包括119名骑警摩托车的交警和49名男性对照者。通过问卷调查，获取了所有受试者的职业史以及手臂系统主观症状的信息。在代表性摩托车的车把和骑手的手上测量了振动。计算了所有骑警摩托车手的4小时和8小时能量等效频率加权加速度以及终身振动剂量。骑警摩托车手中手指变白的患病率为4.2%，但对照组中无人有此症状。与对照组相比，骑警摩托车手中手指麻木（19.3%）、手指僵硬（16.0%）、肩部疼痛（13.4%）和肩部僵硬（45.4%）的发生率显著更高。骑警摩托车车把上的均方根（rms）频率加权加速度在2.2 - 4.9 m/s² rms范围内。计算得到的4小时和8小时能量等效频率加权加速度值分别为2.8 - 4.5和2.0 - 3.2 m/s² rms。发现患病率百分比随累积振动剂量增加而增加的模式。终身振动剂量超过20.1 m² h³ s⁻⁴（标度）的受试者，其手指和肩部症状的患病率显著高于对照组。由于骑警摩托车手的职业振动暴露可能被视为骑手手臂系统症状发展的一个风险因素，因此需要对其进行评估和控制，以推动预防方法的改进。
