DOI: http://dx.doi.org/10.18203/2394-6040.ijcmph20171765

Prevalence of musculoskeletal disorders among heavy earth moving machinery operators exposed to whole-body vibration in opencast mining

Bibhuti B. Mandal, Veena D. Manwar

Abstract


Background: Low back pain (LBP) and degenerative changes in the spinal system are reportedly associated with exposure to low frequency (0.5- 80 Hz) whole-body vibration (WBV). The main objective of the study was to determine prevalence of musculoskeletal disorders among Heavy Earth Moving Machinery (HEMM) operators exposed to WBV in an opencast mine in western India.

Methods: Forty six operators from an opencast mine were recruited as exposed group in a questionnaire based cross-sectional study. Twenty eight employees engaged in sedentary office work were taken as control. All subjects were asked about location and severity of body pain in the past 7 days and 12 months. A four point pain scale was used. Significance of difference of demographic / anthropometric parameters was studied using t-test of independent samples. Association between the pain type and exposure was obtained using Chi-square test. Risk of each type of pain was determined in terms of odds ratio. Adjusted estimate of ORs were obtained through logistic regression modelling, wherein the model fitness was judged using Hosmer-Lemeshow test.

Results: The mean exposure duration was 11.30 ± 7.45 years. LBP was the most predominant MSD which showed highly significant association with exposure (P <0.001). Overall, the risk analysis revealed a significant increase in the likelihood of MSD due to exposure. 39% of the exposed group required medical attention.

Conclusions: Based on subjective response of exposed group, it can be said that prevalence of musculoskeletal pain as manifestation of MSD due to exposure to WBV especially LBP is high among HEMM operators which affected their quality of life. 


Keywords


Occupational hazards, Mine safety, Whole-body vibration, Environmental protection

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References


Mandal BB, Srivastava AK. Musculoskeletal disorders among the dumper operators exposed to whole body vibration in Indian mines. Int J Min Reclaim Env. 2010;24(3):233-43.

Mandal BB, Sarkar K, Manwar V. A study of vibration exposure and work practices of Loader and Dozer operators in opencast mines. Int J Occup Saf and Health. 2012;2(2):3-7.

Mandal, BB, Mansfield NJ. Contribution of individual components of a job cycle on overall severity of whole-body vibration exposure - a study in Indian mines. Int J Occup Saf Ergon. 2016;22(1):142-51.

Kaku LC. Directorate General of Mines Safety [DGMS] circulars. Dhanbad (India): Lovely Prakashan press; 2013. Technical Circular No. 18 (1975), Protection of workers against Noise and Vibration in the working environment. Ministry of Labour (India); 1975: 601.

Recommendations of the 10th Conference on Safety in Mines; 2007 Nov 26-27; New Delhi, (India). Available from: https://elibrarywcl.files. wordpress.com Accessed on 3 February 2017.

Recommendations of the 11th Conference on Safety in Mines; 2013 July 4-5 New Delhi,(India). Available from: http://www.dgms.net/Recomm endation%20of%2011th%20safety%20conference,9.7.13.pdf Accessed on 7 February 2017.

Bovenzi M, Hulshof CJ. An updated review of epidemiologic studies on the relationship between exposure to whole-body vibration and low back pain (1986–1997). Int Arch Occup Environ Health. 1999;72:351–65.

Lings S, Leboeuf-Yde C. Whole-body vibration and low back pain: A systematic, critical review of the epidemiological literature 1992–1999. Int Arch Occup Environ Health. 2000;73:290–7.

National Institute of Occupational Safety and Health (US). Musculoskeletal Disorders and Workplace Factors. Edited by: Bruce P. Bernard (MD, MPH): Department of Health and Human Services (US); 1997. (Public Health Service Centers for Disease Control and Prevention; no. 97-141.)

International Organization for Standardization (ISO). Mechanical vibration and shock - Evaluation of human exposure to whole-body vibration - Part 1: General requirements. (Standard No. ISO 2631-1:1997). Geneva: ISO; 1997.

Eger T, Contratto M, Dickey JP. Influence of driving speed, terrain, seat performance and ride control on predicted health risk based on ISO 2631–1 and EU Directive 2002/44/EC. J Low Freq Noise V A. 2011;30:291–312.

Cann A, Salmoni A, Eger T. Predictors of whole body vibration exposure in transport truck operators. Ergonomics. 2004;47:1432–53.

Eger T, Kociole AM, Dickey JP. Comparing Health Risks to Load-Haul-Dump Vehicle Operators Exposed to Whole-Body Vibration Using EU Directive 2002/44EC, ISO 2631-1 and ISO 2631-5. Minerals. 2013;3:16-35.

Rajsekhar S, Sharma P. Morbidity among mine workers: a cross sectional study in Chitradurga, Karnataka, India. Int J Community Med Public Health. 2017;4(2):378-84.

Sharma R, editor. Epidemiology of musculoskeletal conditions in India. New Delhi, India: Indian Council of Medical Research (ICMR);2012.

Abrams R. Sound and vibration in pregnancy, in Seminars in Perinatology, Part 11, W.B. Saundewrs, Philadelphia;1990: 273-334.

Peters A, Abrams R, Gearhardt K, Wasserman D. Acceleration of the fetal head induced by vibration of the maternal abdominal wall in sheep. Am J Obstet.Gynecol. 1996;174:552-6.

Seidel H. On the relationship between whole-body vibration exposure and spinal health risk. Industrial Health. 2005;43:361-77.