Citation
Mohammad Yusof, Nur Athirah Diyana
(2016)
Association between occupational and non-occupational risk to work-related musculoskeletal disorders among traffic police riders.
Masters thesis, Universiti Putra Malaysia.
Abstract
Approximately 50% of the traffic police use a motorcycle as their main vehicle
while on duty. These professional motorcycle riders are ride for many hours while
on duty with the mean 5.64 hours per day which the exposure of vibration
becomes critical since overexposure may cause discomfort, decrease their
performance and even health risk including work-related musculoskeletal
disorders (WMSDs). However, there have been no studies on vibration and
WMSDs has been conducted among this group of workers in Malaysia. Thus, it
is important that this research needs to be completed in order to identify the
factors that can give health effects in developing WMSDs among traffic police
riders. A cross-sectional study was done in Traffic Police Station in Kuala Lumpur
and Johor Bahru on January until June 2015. One-hundred-and-thirty-seven
riders participated in this study. A set of questionnaire which included
Standardized Nordic Questionnaire was used. The Svantek 106 is a six-channel
human vibration meter was also used to assess and measure the level of Whole
Body Vibration (WBV) and Hand Arm Vibration (HAV). The one-year prevalence
of WMSDs among the traffic police riders was 67.9%. The highest WMSDs
symptom was reported at the neck (35.8%) and shoulder (35.8%). The mean
WBV and HAV of frequency-weighted acceleration in eight hours, A(8) was 0.44
m/s2 and 2.25 m/s2 respectively. Meanwhile, the level of Vibration Dose Value
(VDV) in WBV exposure was 13.85 m/s2. Multiple logistic regression analysis
revealed that duration of riding traffic police motorcycle (OR= 0.175, 95%
CI:0.052, 0.581), year of services as traffic police riders (OR=0.152, 95% CI:
0.040, 0.567), and HAV in A(8) (OR=3.053, 95% CI: 1.126, 8.280) were
significant risk factors to one-year prevalence of WMSDs. As a conclusion,
although the level of WBV and HAV did not exceed both Exposure Action Value
(EAV) and Exposure Limit Value (ELV) in term of A(8), the VDV level in WBV
was exceeded EAV. In addition, ninety-three of the traffic police riders reported
WMSDs symptoms for the past 12 months. Duration of riding (OR= 0.175, 95%
CI:0.052, 0.581), year of services as traffic police riders (OR=0.152, 95% CI:
0.040, 0.567) and HAV in A(8) (OR= 3.053, 95% CI: 1.126, 8.280) were found to
be most important risk factors for WMSDs among traffic police rider.
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