The Association of Reactive Oxygen Species Levels on Noise Induced Hearing Loss of High Risk Workers in Dr. Soetomo General Hospital Surabaya, Indonesia.

Excessive noise exposure could increase the production of reactive oxygen species in the cochlea, thus causing the risk of noise-induced hearing loss (NIHL). Noise is commonly found in the industrial sites. However, public places like hospital also can have noisy location which risk the workers of NIHL. To analyzed the correlation of reactive oxygen species and hearing impairment to employees at risk in the hospital. Participants were obtained by identifying the employees in hospital from 3813. They were examined for baseline characteristics, hearing loss and reactive oxygen species. Hearing loss was defined as audiometry and tympanometry level. The statistical test that used in this study is Chi square test (p < 0.05). The proportion of participant was 42.43 ± 10.72 years old in women (58.33%) and noise levels at Dr. Soetomo General Hospital was 98.15 ± 8.16 dB in range 85.39-112.90 dB. The prevalence of NIHL was 47.92% (audiometry) and 70.83% (otoacoustic emission). Reactive oxygen species estimated 5.55 ± 4.39 ng/ml. Statistical analysis of reactive oxygen species to audiometry (p = 0.993) and reactive oxygen species to otoacoustic emission (p = 0.647). Increased production of reactive oxygen species that cause hearing loss, but there was no correlation between reactive oxygen species and hearing loss in risk worker at the hospital.