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886 Auditory dysfunction in workers from a printing press exposed to organic solvents
  1. A Juarez,
  2. xxx Aguilar,
  3. O Trujillo,
  4. D Fierro,
  5. L Trejo,
  6. C Madriga
  1. Occupational health research


Introduction There are various chemical agents such as organic solvents (OS), which can cause hearing loss. The objective of this study was to determine the presence of auditory dysfunction in a mixture of DO and noise-exposed workers from a printing press.

Cross-sectional study was conducted including 176 from a printing press in Mexico City, exposed to noise and an OS mixturesWe categorised workers within 2 groups I. Exposed for <10 and II. Exposed ≥10 years, we estimated hearing loss through a multiple linear regression model.

Results The mean age of group I was 32±9.3 [19–62] years and for group II was 41. 6±6. 5 [29–58] years. The mean noise was 78.10±10.6 dB58.1 dB and 93.8 dB, group I. showed a threshold fall in the 4 kHz up to 25 DB in both ears, with an average recovery of 5 dB at 8 kHz Right ear: 2000 Hz: II β=4.2 (p=0.003), 4000 Hz: II β=5.6 (p=0.002), 8000 Hz II β=3.8 (p=0.5); Left ear: 2000 Hz: II.=4.1 (p=0.002), 4000 Hz: II β=5.2 (p=0.006), 8000 Hz: II β=5.2 (p=0.002) the second model high frequencies (2, 4, and 8 KHz) in right ear was II β=4.4 (p=0.002) and in the left ear was II β=4.8 (p<0.001).

Discussion Our studied population, showed an overall prevalence of auditory dysfunction of 3.94%, group II was the most affected Workers with a concomitant exposure to noise and DO >10 years have a higher auditory dysfunction prevalence, compared with workers without exposure to these agents.

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