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Factors Related to Musculoskeletal Disorders in Quality Control Palm Workers at Palm Purchasing Establishments in Sichon District, Nakhon Si Thammarat, Thailand

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Factors Related to Musculoskeletal Disorders in Quality Control Palm Workers at Palm Purchasing Establishments in Sichon District, Nakhon Si Thammarat, Thailand Annals of Agricultural and Environmental Medicine 2020, Vol 27, No 2, 207–210 ORIGINAL ARTICLE www.aaem.pl Factors related to musculoskeletal disorders in quality control palm workers at palm purchasing establishments in Sichon District, Nakhon Si Thammarat, Thailand Jittaporn Mongkonkansai1,A-D , Chamnong Thanapop1,E-F , Uraiwan Madardam1,E-F , Adulropa Cheka1,B-C , Aliya Epong1,B-C , Arfan Arwae1,B-C 1 Walailak University, Nakhon Si Thammarat, Thailand A – Research concept and design, B – Collection and/or assembly of data, C – Data analysis and interpretation, D – Writing the article, E – Critical revision of the article, F – Final approval of article Jittaporn Mongkonkansai, Chamnong Thanapop, Uraiwan Madardam, Adulropa Cheka, Aliya Epong, Arfan Arwae. Factors related to musculoskeletal disorders in quality control palm workers at palm purchasing establishments in Sichon District, Nakhon Si Thammarat, Thailand. Ann Agric Environ Med. 2020; 27(2): 207–210. doi: 10.26444/aaem/122254 Abstract Introduction and objective. The palm quality selection process has risks of problems in ergonomics. The aim of this research is to study the factors related to musculoskeletal disorders in quality control palm workers at palm purchasing establishments in Sichon District, Nakhon Si Thammarat, Thailand. Materials and method. A cross-sectional study was conducted with 50 workers with musculoskeletal disorders, as assessed by the Bureau of Occupational and Environmental Disease, Ministry of Public Health, Thailand. Ergonomic risk assessment was performed using the Rapid Entire Body Assessment (REBA), and the data studied with the help of descriptive statistics and chi-square analyses. All data were analyzed using SPSS version 19. Results. The sample included 96% of males with an average age of 34.2 years (SD=11.09). The participants used pickup trucks to transport palm oil from the plantation. 72% of the workers had worked at the plantation for 4.9±4.9 years; 54% did not work overtime. The average amount of palm oil collection for palm quality control was 23.5±11.3 tons/day. Quality control palm workers using sidecars (28%) were found to be moderately at risk, and those using trucks (72%) were at a high level of risk. The prevalence of musculoskeletal disorders after one year at work was 78%. The amount of palm oil controlled per day, working overtime, car type used for transport, and ergonomics risk level, were significantly related to musculoskeletal disorders in quality control palm workers (p-value <0.05). Conclusions. The results indicate a need for the top management and health-related personnel to promote occupational health and safety measures for quality control palm workers. Keywords musculoskeletal disorders, quality control palm workers, palm purchasing establishments INTRODUCTION Palm oil is an economic crop, the most popular in Southern Thailand, after rubber. In 2017, palm oil plantations covered The palm oil industry is rapidly expanding worldwide an area of 4.18 million rai (1 rai = 1,600 sq. m.) with a making it the largest industry in the domain of oil and fat production of 3,048 kilograms per rai [5]. Palm oil provides production from 2013 – 2018 [1, 2]. The world’s palm oil by-products from all parts of the palm tree, which can be used production has tended to increase by 3.71% per year since further in products of daily consumption, such as cosmetics, the drought situation began to unravel from 2013 – 2017. The soaps, candles, food products, alternative energy, etc. [6, worldwide demand for palm oil tends to increase by 2.99% 7]. Eighty-five percent of palm oil worldwide is used in the per year, as palm oil is the cheapest plant oil compared to food industry [8]. Palm plantation in the southern region other plant oils. This is the reason for the increasing demands is expanding continuously because of the suitable terrain for palm oil for consumption and renewable energy. In 2018, and climate. The province of Nakhon Si Thammarat has Indonesia produced the most palm oil, followed by Malaysia. the fourth highest palm plantations in the country [9]. The The two countries together produced 83.98% of the world’s Sichon District has the highest production, with 23.5% of the palm oil. Thailand was ranked third in the world, producing total produce in the province. Seventy percent of the palm 2.70 million tons, which accounted for 3.9% of the world’s oil product in Nakhon Si Thammarat province is sold to total palm oil product [3]. More than 1 million workers in palm purchasing establishments. Palm planters prefer selling Malaysia and Indonesia, work in the palm oil industry [4]. In their products to palm purchasing establishments because Thailand, most palm oil workers work in palm plantations it is convenient, close to the production site, and most palm located in southern Thailand. plantations have palm oil cutting teams to trim leaves and to add fertilizer [10]. The process of purchasing palm consists Address for correspondence: Jittaporn Mongkonkansai, Walailak University, Thailand of inbound weighing, quality controlling, determining the E-mail: [email protected] purchase price, weighing outgoing vehicles, and storage. Received: 25.02.2020; accepted: 09.05.2020; first published: 02.06.2020 Working on palm plantations often involves issues of unsafe 208 Annals of Agricultural and Environmental Medicine 2020, Vol 27, No 2 Jittaporn Mongkonkansai, Chamnong Thanapop, Uraiwan Madardam, Adulropa Cheka, Aliya Epong, Arfan Arwae. Factors related to musculoskeletal disorders… working postures, such as bending down to lift the palm, The assessment form is from the Bureau of Occupational heavy palm bunching, and using spades and various other and Environmental Diseases, Department of Disease tools for prolonged periods, which cause subsequent back Control, Ministry of Public Health in Thailand [20], and shoulder pains [11]. measuring the severity of symptoms in each part of the Studies of the palm purchasing process indicate that body according to four levels: the quality control process from the truck into the palm 0 = normal; plantation also has the potential to cause ergonomic problems 1 = symptoms during work, but after resting, symptoms because workers use steel to pierce the palm for quality disappear; checking, and because of the heavy weights with which they 2 = symptoms during work hours, and even after resting regularly deal. If workers have to work for long hours, it may symptoms do not disappear; potentially cause musculoskeletal disorders similar to those 3 = symptoms during work hours and symptoms prevent in the palm planters in southern Thailand. It was found that working, even after resting. 82.5% of palm plantation workers have aches in the whole A severity rating of 2 or higher meant that the worker is body; 54.2% and 47.5% reported pains in the shoulders and considered to have musculoskeletal disorders. back, respectively [12]. This is consistent with the symptoms The questionnaire has tool quality testing with a of palm planters in other countries who have intense lower conformance index of 0.9 between Index of Item and back, upper back, and shoulder pains [13–15]. Considering Objective Congruence (IOC). The data were analyzed the high ergonomic risk levels caused by such issues, work with the help of descriptive statistics and chi-square at conditions should be improved immediately [14, 16, 17]. 95% confidence level. Studies in both Thailand and other countries have reported 2) The REBA ergonomic risk assessment form [21] identifies significant relationships between musculoskeletal disorders ergonomic risks of the musculoskeletal disorders caused by in palm planters, the process of palm cutting and harvesting, many factors, such as improper working posture, repeated age, body mass index, smoking, arm and leg muscle strength, actions, heavy lifting, use of tools or equipment not suitable raising and moving items with physical force, the amount of for workers, etc. The assessment is an analysis of posture production per day, and moderately hot weather conditions and body movements while the workers are at work, [18, 19]. considering various factors, such as neck, trunk, upper Quality control palm workers at small palm purchasing arm, lower arm, wrist, work piece holding characteristics, establishments require using a posture with movement in and frequency of movements over a period of time. The all body parts (e.g., reaching out, twisting wrists, bending assessment of risk is categorized into four levels: low, down). Research exploring the risk of working postures in medium, high, and very high. workers at small palm purchasing establishments, utilizing the Rapid Entire Body Assessment (REBA) technique, is still insufficient. There has been research in Thailand and abroad RESULTS on the factors related to musculoskeletal disorders in palm planters; however, these studies have focused on the process General information. The sample included 96% males with of cutting or harvesting fresh palm and have not addressed an average age of 34.2±11.09 years. Fifty-four percent had the palm quality control process at palm purchasing normal body mass index; 42% had graduated from secondary establishments. This preliminary survey of 50 palm industry school; 66% did not exercise; 72% used pickup trucks to workers identifies quality control as another process that transport palm oil from the palm plantation, and had worked puts workers at risk of developing musculoskeletal disorders. at the plantation for 4.9±4.9 years; and 54% did not work overtime. The average amount of palm oil collection for palm quality control was 23.5±11.3 tons/day. OBJECTIVES Ergonomic risk assessment using REBA. It was found that The aim of the study is to investigate the prevalence of 28% of the quality control palm workers used sidecars and ergonomic risk factors that may contribute to musculoskeletal had a moderate level of risk, and 72% used trucks and had a problems, and to assess the risk level of ergonomics in quality high level of risk (Tab.
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