• Nornazirah Ahmad Kamarudin Department of Public Health Medicine, Faculty of Medicine and Health Sciences, University Malaysia Sabah, Malaysia.
  • Fredie Robinson Department of Public Health Medicine, Faculty of Medicine and Health Sciences, University Malaysia Sabah, Malaysia.
  • Sahipudin Saupin Department of Public Health Medicine, Faculty of Medicine and Health Sciences, University Malaysia Sabah, Malaysia.
  • Ahmad Hazim Mohammad Department of Public Health Medicine, Faculty of Medicine and Health Sciences, University Malaysia Sabah, Malaysia.
  • Ophelia Domingo Ophelia Hearing Specialist, Kota Kinabalu, Sabah, Malaysia
  • Nur hafizah Hazwani Salan Sandakan Health District Office, Sabah, Malaysia.




Occupational hearing loss, vector control unit workers, noise exposure, high-risk group, pesticide exposure, smoking, Sabah


Risk factors related to hearing loss have been identified in many industrial workplaces. Nevertheless, despite the annual increment in hearing loss cases among vector control unit workers in Malaysia, risk factors associated with hearing loss among this population have not yet been measured properly. A cross-sectional study was conducted to determine factors associated with occupational hearing loss among Ministry of Health (MOH) vector control unit workers in Sabah from May to June 2020 involving 129 participants from three randomly selected district health offices. The data were collected via a validated self-administered questionnaire and audiometry test results and were analysed using IBM Statistical Package for Social Science (SPSS) version 26. Chi-square test, logistic regression, and multivariate analysis were used with p-value set at 0.05 with a 95% Confidence Interval (CI). The overall prevalence of hearing loss was 45.5% with a higher prevalence among the high-risk group (57.3%) than the low-risk group (12.5%). The difference was statistically significant (p < 0.05). Long duration of noise exposure (> 3 years) and high-risk group showed a significant association with hearing loss (p < 0.05) with the odds ratio of having hearing loss in workers with a long duration of noise exposure at 12.8 (95% CI = 4.02-40.5) while among the high-risk group it was 20.5 (95% CI = 3.98-105.1) when adjusted for age, smoking, and pesticide exposure. The results of this study can contribute to strengthen the implementation of risk controls to prevent further hearing loss among vector control unit workers.



Leavenworth G. Factories and Machinery (Noise Exposure) (Revocation) Regulations 2019. State Health Care Am. 2019;(March):36-43.

CDC OHU. NOISE AND HEARING LOSS PREVENTION-Risk factors. The National Institute for Occupational Safety and Health (NIOSH). Published 2018.

Feder K, Michaud D, McNamee J, Fitzpatrick E, Davies H, Leroux T. Prevalence of Hazardous Occupational Noise Exposure, Hearing Loss, and Hearing Protection Usage among a Representative Sample of Working Canadians. J Occup Environ Med. 2017;59(1):92-113.

Filza Ismail A, Daud A, Ismail Z, Abdullah B. Noise-induced hearing loss among quarry workers in a north-eastern state of Malaysia: A study on knowledge, attitude and practice. Oman Med J. 2013;28(5):331-336.

Anita AR, Hassim N. Effect of noise and pesticide exposures among foggers in Selangor Health District Office. J Occup Saf Heal. 2013;10(1):27-37.

Department Of Occupational Safety And Health, Ministry Of Human Resource M. Guidelines for Manual Handling at Workplace. MATEC Web Conf. 2018:1-10.

Department of Occupational Safety & Health Malaysia, DOSH. Industry Code of Practice for Management of Occupational Noise Exposure and Hearing Conservation 2019. Ind Code Pract. 2019.

OSHA. Occupational Noise Exposure-Hearing COnservation Program. Retrieved from https://www.osha.gov/noise/hearing-programs. Published 2021. Accessed June 22, 2021.

Moroe NF, Khoza-Shangase K. Recent advances in hearing conservation programmes: A systematic review. South African J Commun Disord. 2020;67(2).

Dahlstrom DL. Occupational Noise. Hamilt Hardy’s Ind Toxicol Sixth Ed. 2015;(9):1115-1122.

Owolawi IV. Noise Exposure and Its Auditory Effect on Industrial Workers. 2021:365-375.

Mustalkah MB. Noise Induces Hearing Loss and Factors affecting it among the Vector Control Workers. Fac Med Heal Sci Univ Malaysia Sarawak. 2013.

Ding T, Yan A, Liu K. What is noise-induced hearing loss? Br J Hosp Med. 2019;80(9):525-529.

Sam WY, Anita AR, Hayati KS, Haslinda A, Lim CS. Prevalence of hearing loss and hearing impairment among small and medium enterprise workers in Selangor, Malaysia. Sains Malaysiana. 2017;46(2):267-274.

Roza Sarimin, Mdm. Ku Nurhasni Ku Abdul Rahim, Mdm. Balqis Abd. Ghani. HTA: Integrated Vector Management for Aedes control. 2019;19.

Xua H, Mao Y, Xu B. Association between pyrethroid pesticide exposure and hearing loss in adolescents. 2020.

Zhao Y, Li J, Zhang M, et al. Machine Learning Models for the Hearing Impairment Prediction in Workers Exposed to Complex Industrial Noise: A Pilot Study. Ear Hear. 2019;40(3):690-699.

Manivasagam D. Empowering Occupational Health Doctors through the Occupational Safety & Health (Noise Exposure) Regulations 2019. 2019;16(1).

OSHA. Preventing Occupational Hearing Loss. Retrieved from https://www.osha.gov/SLTC/noisehearingconservation/loud.html. Published 2019. Accessed June 3, 2021.

Alvarado, Carlos J, Fuentes-Santamaría, et al. Age-related hearing loss is accelerated by repeated short-duration loud sound stimulation. Front Neurosci. 2019;13(FEB):1-14.

Luo L, Jiang J, Huang S, He J, Li J. Analysis on characteristics of hearing loss in occupational noise-exposed workers in automotive manufacturing industry. 2018.

Choochouy N, Kongtip P, Chantanakul S, Nankongnab N, Sujirarat D, Woskie SR. Hearing Loss in Agricultural Workers Exposed to Pesticides and Noise. Ann Work Expo Heal. 2019;63(7):707-718.

Sheikh MA, Williams W, Connolly R. Exposure to ototoxic agents and noise in workplace - A literature review. 2nd Australas Acoust Soc Conf Acoust 2016. 2016;1(November):527-536.

Vyskocil A, Leroux T, Truchon G, et al. Studies and Research Projects Effect of Chemical Substances on Hearing Interactions with Noise Chemical Substances and Biological Agents.; 2012.

IOSH. Noise-Noise control measures. Retrieved from https://iosh.com/resources-and-research/our-resources/occupational-health-toolkit/noise/control-measures/. Published 2018. Accessed July 5, 2021.

World Health Organization. Addressing the Rising Prevalence of Hearing Loss. Vol 9.; 2018.

Ong SQ. Dengue vector control in Malaysia: A review for current and alternative strategies. Sains Malaysiana. 2016;45(5):777-785.

Ministry of Human Resources. Guidelines on Occupational Health Services Department of Occupational Safety and Health Ministry of Human Resources Malaysia. 2005.

Bauer ER, Babich DR. Administrative controls for reducing worker noise exposures. 2004 SME Annu Meet Prepr. 2004:51-59.

Kateman E, Verbeek J, Morata T, Coolsma B, Dreschler W, Sorgdrager B. Interventions to prevent occupational noise induced hearing loss. Cochrane Database Syst Rev. 2017;(1).

Mirza R, Kirchner DB, Dobie RA, Crawford J. Occupational Noise-Induced Hearing Loss. J Occup Environ Med. 2018;60(9):e498-e501.

Leshchinsky A. The Impact of Annual Audiograms on Employee’s Habits and Awareness Regarding Hearing Protection and Noise Induced Hearing Loss, On and Off the Job. Work Heal Saf. 2018;66(4):201-206.




How to Cite

Ahmad Kamarudin, N., Fredie Robinson, Saupin, S. ., Mohammad, A. H., Domingo, O. ., & Salan, N. hafizah H. (2022). HEARING LOSS AMONG VECTOR CONTROL UNIT WORKERS IN BORNEAN MALAYSIA: A CROSS-SECTIONAL RISK FACTORS STUDY. Malaysian Journal of Public Health Medicine, 22(2), 61–67. https://doi.org/10.37268/mjphm/vol.22/no.2/art.1271