Abstract Introduction: Exposure of PM2.5 and PM10 released from combustion of biomass activity caused respiratory health among children. Objective: This study aims to determine the association between exposure of PM2.5 and PM10 with DNA damage in primary school children living nearby palm oil combustion activity at Semenyih. Methods: A cross sectional comparative study were conducted among Malay primary school children in school A located 2.7km from palm oil activity (N=82) and school B located about 40km away from the palm oil area (N=85). A standardized questionnaire were distributed to respondent’s parents. Concentrations of PM2.5 and PM10 were measured by using Dust Trak DRX Aerosol Monitor Model 8534 and Escort LC Personal Sampling Pump. Measurement of indoor and outdoor air pollutants were conducted in schools and home. Buccal cells were collected, which then followed by micronucleus assay. Results: Concentration of PM10 and PM2.5 at home of studied group were significantly higher compared to comparative group with p value (p=0.007) and (p=0.018) respectively. PM10 and PM2.5 of studied schools were significantly higher compared to comparative schools with p value (p=0.014) and (p=0.04) respectively. MN frequencies of studied group were significantly higher compared to comparative group (p=0.001). Significant difference of respiratory symptoms were found between two groups which are cough, phlegm, wheezing and chest tightness (p=0.001). There were significant correlation between PM10 with MN frequency of studied group and comparative group with r= 0.562; p=0.001. Conclusion: This study indicated that the exposure of PM10 and PM2.5 would increase the risk of having respiratory health symptoms and might induce the micronuclei formation among children who lived near palm oil activity area.

Abstract Introduction: Malaysian traffic police are always working on the public roads to alleviate traffic congestion and therefore exposed them to the polluted air every day. In particular, polluted air containing PM2.5 is dangerous to their respiratory health as they can penetrate deep into the lungs, leading to bronchitis, lung cancer and many more. Hence, this research examined the relationship of personal exposure level to PM2.5 with respiratory symptoms among traffic policemen in Kuala Lumpur and Johor Bahru. Methods: 134 participants among traffic policemen were agreed to participate in this study. They were requested to complete a questionnaire regarding the sociodemographic background and respiratory health information. The questionnaire was adopted from International Union Against Tuberculosis Lung Diseases (1986). Personal exposure level of PM2.5 was measured using an air pump with 5.0µm pore size PVC filter. Results: The mean exposure level of PM2.5 among traffic policemen was 28.69 µg/m3. It was found that some of them possess respiratory symptoms (Coughing 33.6%, Phlegm 25.4%, Wheezing 14.9% and Shortness of breath 32.1%). There was significant association detected at p-value < 0.05 in coughing. Despite, there was no significant association in other symptoms such as phlegm, wheezing and shortness of breath. Conclusions: Traffic police were exposed to a relatively high level of PM2.5 (12.4 µg/m3 to 55.3 µg/m3) and showed symptoms of respiratory effects. Therefore, recognition of the risks connected with occupational lung disease and exposure monitoring must be a high priority. This baseline data can serve as a reference to the top management of traffic police officers in order to develop an occupational safety and health guideline for police officers as required by Occupational Safety and Health Act (OSHA, Act 514 1994).

Abstract Introduction: Noise was evident to reduce job satisfaction among workers which will negative impacts to workers including increase job turnover, decrease motivation and increased number of accidents. This study aims to explore job satisfaction and its risk factors among workers working in a noisy workplace. Method: The study design was cross-sectional study which involved 167 workers in a cable manufacturing factory selected by simple random sampling. MSQ was used to assess employee’s satisfaction with their job on seven facets and sound level meter was used to measure workplace noise level. Results: All respondents were exposed to noise above permissible exposure limit. Most workers (49%) were moderately satisfied with their work. Factors that were rated as lowest level of satisfaction were work itself (the ability to work alone) (40%) and the way company system policies are implemented (40%). Factors with the highest level of satisfaction were their freedom to implement their judgement (responsibility) (51%) and the supervision quality of their superiors (51%). The most dominant facet predicting total satisfaction level was recognition followed by advancement and company policy and administration. All variables in socio-demographical and job characteristics were not significantly associated with their level of job satisfaction except noise. Noise was significant in predicting one facet of job satisfaction which was physical work condition. Conclusion: Overall, the average level of job satisfaction among respondents were moderate and they were exposed to occupational noise which was the only significant study variable correlated with their job satisfaction.

Abstract Introduction: Water based Metalworking fluids (MWF) are commonly used in machining industries and are excellent media for microorganism growth. The study aimed at determining the relationship between the airway inflammation as indicated by fractional exhaled nitric oxide (FeNO) with the microbial contaminants of MWF in aerosol and bulk sample as well as the workers’ reported respiratory health symptoms. Methods: This cross sectional study was carried out on 138 machining workers. Their FeNO were measured using NIOX-MINO instrumentation. The microbial assessments of bacteria and fungus were carried out on the MWF bulk samples and the aerosol using a sampler DUO SAS SUPER 360TM. Results: Findings showed significant difference in the FeNO levels in workers from various job sections (p=0.01). Significant relationships found between high FeNO levels with their closeness to the machines (p=0.03), high number of machines in the workplaces (p=0.02), high environmental bacteria colonies (p=0.04), longer employment years (p<0.001) and more frequent cough reported (p=0.03). Conclusion: Risk factors in the workplace which contributed to higher airway inflammation include their short distance and high number of machines, high environmental bacteria colonies in aerosol and bulk samples as well as longer employment years. Exposures to MWF had also resulted in significantly increased coughing among the respondents.

Abstract Introduction: Occupational stress is a condition in which one or several factors in the workplace interact with workers, therefore it causes disturbance of the equilibrium both physiological and psychological matter. For a driver, occupational stress will impact on the declining performance that may threaten the safety while driving. Consequently, occupational stress becomes one of the most processes which is being related to harmful behavior to drivers that may affect the risk of accidents. This study aims to analyze the correlation between quantity and quality of sleep with occupational stress on truckload drivers. Methods: This study uses a cross-sectional method. Data instruments are utilizing a questionnaire and few additional instruments (e.g. cocoro meter, fitbit, sphygmomanometer, and oximetry) to measure the relationship between quantity and quality of sleep to occupational stress as its supporting data. The data obtained were statistically analyzed using the chi-square test and different mean test. Results: 27 respondents (60%) experiencing occupational stress at a mild level and 18 respondents (40%) experiencing occupational stress at a moderate level. Conclusion: In addition, from the results of the analysis, it was found that there is a correlation between quantity and quality of sleep with occupational stress on truckload drivers.

Abstract Discomfort measurement has usually been attempted by asking the participants to rate the scale of their discomfort which commonly termed as a subjective scale. Various studies had conducted the discomfort level on vehicle seat by using Visual Analogue Scale (VAS) and Likert scale. VAS is a tool that use to measure a discomfort or characteristics in range across a continuum of values. Meanwhile, Likert-scale is a tool consist of items that require respondents to rate their degrees of comfort or discomfort with various declarative statements. Thus, the purpose of this study is to review, discuss and compare between the VAS and Likert scale used on the development and assessment of sitting discomfort survey in seat vehicles. The literature on various topics related to questionnaire development on discomfort in seat vehicle were collected from electronic databases. Four high-quality studies were eligible and met the inclusion and exclusion criteria. Overall, there is no evidence and conclusion that neither visual analogue scale nor Likert scale are better to one another. Therefore, it can be concluded that either of this scale still applicable for the ergonomic research application as both of this scale have their own pros and cons.

Abstract Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous pollutants with toxic effects and adverse health impacts on general population. Several methods of extraction had been applied to extract PAHs from human blood samples such as solid phase extraction (SPE). The SPE represents one of the most common techniques for extraction and clean-up procedures as it needs low quantity of solvents with less manual efforts. Similarly, various analytical instruments like gas chromatography coupled to mass spectrometry (GC-MS) was used to measure the PAHs levels. Gas chromatography is a simple, fast, and very efficient method for solvents and small organic molecules. This review provides an overview of the measured concentrations of PAHs in human blood samples through the application of SPE and GCMS during the last ten years. While these studies used various solvents, their application of SPE method and GC-MS revealed rewarding results about the determination of PAHs levels in the human samples.

Abstract Introduction: Computed tomography (CT) has been widely used for postoperative spine assessment. However, the effectiveness of CT is limited by the presence of multiple artefacts surrounding metal implants. An artefact causes degradation of image quality and obscures the interpretation of spine CT images by a radiologist. The purpose of this study was to evaluate the optimum angle of gantry tilt and metal rod placement which produced the least metal artefact on CT images. Methods: A customised phantom was developed with different transverse angles of metal placement. The transverse angles of metal placement inside the phantom varied at 20°, 30°, 40° and 45°. The phantom was scanned with CT scanner at 0° axial scan angle. It was followed by acquisitions at different gantry tilt angles ranging from −12° to 20°. Quantitative and qualitative assessment by determining the signal-to-noise ratios (SNRs) of the CT images was performed. Results: The severity of the metal streak artefact increased as the metal insertion angles became wider up to 45° due to the widespread of streaking area. The severity of artefacts was reduced with the increment of the gantry tilt angle, which was observed in images acquired at 20°. Conclusion: For the gantry tilt angulation technique, the optimum gantry angle for metal artefact reduction is at the widest angle, which is +20° angulation. Although the gantry tilt technique did not eliminate the metal artefacts, it enabled a significant reduction of metal artefacts and improved image quality.

Abstract Introduction: Recruitment of potential blood donors from a younger age group is a good effort because they would be in good health and may have a long journey in blood donation. This study evaluated the motivating and deterring factors for donating blood among blood donors, who are students pursuing higher education. Methods: This was a cross-sectional study using a set of questionnaires, involving 391 students in Kota Bharu, Kelantan, Malaysia. The research tool was adapted and modified, as well as validated and pilot-tested to ensure its validity and reliability. Data were analysed using the SPSS and Stata software. Results: The most highly rated motivating factor for donating blood was to help others and to create a good practice (98%). The motivating factor of being interested in a blood donation campaign was highly rated by female respondents (87%) compared to male respondents (79.1%). The most highly rated deterring factor was the dislike for skipping a class to donate blood (30.9%), which was highly rated as a positive response by female blood donors (35.1%). There was a significant difference between the motivating factors (p = 0.043) and the deterring factors (p = 0.011), as seen between gender. Items that have the logo of the blood donation centre, such as T-shirts, towels, mugs or bags are rated as the most attractive incentive (87%). Conclusion: Altruism was the main reason for young blood donors choosing to donate blood. Social media usage should be considered when promoting blood donation campaigns to this age group.

Abstract Introduction: The practice of uncrossmatched red blood cells (URBC) transfusion has been accepted as part of resuscitation efforts in Emergency Departments (ED), especially in the case of hypovolemic shock secondary to blood loss. This study aimed to evaluate the outcome of patients who received URBC during the resuscitation process. Methods: This was a retrospective cross-sectional study among patients who received at least one unit of URBC in the ED at Hospital Universiti Sains Malaysia between March 1, 2016 and December 31, 2017. The outcome of patients who received URBC were analysed descriptively and presented as numbers and percentages. Simple log regression was used to analyse the association between the number of URBC given and the outcome of the patients. Results: A total of 106 patients were involved in this study, with 63 (59.4%) of them were male and 43 (40.6%) were female. The mean age of these patients was 41.58 years old. For the outcome, 25 patients (23.6%) had an activation of massive transfusion protocol (MTP), 37 patients (34.9%) received emergency surgical procedure, and 28 patients (26.4%) died during hospitalisation. The mean length of hospital stay was 10.65 days (SD: 17.4). Numbers of URBC received have a statistically significant association with mortality status (p = 0.015) and activation of MTP (p = 0.02), but no significant association with the need for emergency procedure (p = 0.469). Conclusion: The numbers of URBC transfused can be associated with mortality and the activation of MTP.