A survey of taxi drivers was conducted to determine the actual situation of drivers' low back pain (LBP). The survey was carried out in October 2002, the target drivers were asked to complete a questionnaire which contains questions regarding physique of drivers, demographic features, working conditions, office environment, health conditions, the presence of low back pain, the level of low back pain based on Visual Analogue Scale and Roland-Morris Disability Questionnaire score. As a result, the total number of valid responses was 1,334 and the response rate was 71 percent, and the 1-wk prevalence of LBP was 20.5 percent of respondents. Regarding 275 subjects with LBP, Visual Analogue Scale (VAS) averaged 4.3. There was a positive weak correlation between VAS and Roland-Morris Disability Questionnaire score (R=0.41). And Logistic regression analysis was performed to examine the relationship between LBP and occupational factors, the results suggested following items as risk factors; such as history of LBP, suffering from fatigue, diseases other than LBP and smoking habit.
The factors in volved in occupational low back pain occurring in professional drivers were investigated epidemiologically with questionnaires (92 items) including low back symptoms, personal factors and occupational factors. The responses of one hundred fifty-three of one hundred eighty-one truck drivers who work in a large chemical industry corporation were analyzed after they had completely filled in questionnaires. As analysis of the results shows, the prevalence of LBP in one month of the survey was 50.3%. Correlating among data of personal factors and LBP, the prevalence of LBP was significantly higher in the drivers (Odd's ratio of 2.7) who answered "yes" to the item "shortage of spending time with family than in the drivers who didnt answer "yes. The occupational factors, working load and working environment showed no correlation with the prevalence of LBP. In contrast, 3 items of the working format related significantly to the prevalence of LBP: "irregular duty time (Odd's ratio of 3.0), "short resting time (2.4), and "long driving time in a day (2.0). Eighty-one of the 153 drivers (52.9%) pointed out the relationship between LBP and work, especially work which muolves vibration or road shock. Our results and the results from previous published studies suggested that vibration is an obvious risk factor for LBP. From the viewpoint of prophylaxis, an improvement in working conditions reduces the incidence of drivers' LBP to some extent.
Although rheumatoid involvement of the lumbar spine is relatively rare, we report a patient with rapidly progressing cauda equina symptoms due to rheumatoid diskitis. A 72-year-old woman was admitted to our hospital because of motor weakness below the iliopsoas muscle and sensory disturbance beneath the level of L2. Plain X-ray films, computed tomography, and magnetic resonance imaging demonstrated destruction of the L2/3 intervertebral disc and endplates with subluxation of the facet joints. The dural sac was compressed. Based on a diagnosis of spinal canal stenosis due to rheumatoid diskitis, we performed partial laminectomy and posterolateral fusion with pedicle screws. The neurological deficits improved immediately. The mechanism of intervertebral disc destruction in this case is thought to be rheumatoid nodes or enthesitis. Destruction of the facet joints and the intervertebral disc might have led to severe instability and spinal canal stenosis.
Spondyloepiphyseal dysplasia congenita (SED) is a rare form of skeletal systemic disease, characterized by congenital dwarfism with a short trunk and epiphysial dysplasia in the long bones and vertebral bodies. Patients also frequently suffer from atlanto-axial instability due to os odontoideum. Compression of the spinal cord caused by atlanto-axial instability is a common, serious complication in SED patients, and causes severe spinal cord symptoms or occasionally sudden death. We present an SED patient who underwent a posterior fusion of the occiput to the cervical spine for severe spinal cord symptoms due to atlanto-axial instability.
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