title: [The levels of vitamins A, E, B12 and folic acid in noise-induced hearing loss].
abstract: OBJECTIVE
  To investigate the levels of vitamin A, E, B12, folic acid in employees with hearing loss due to noise.
  
  
  METHODS
  Employees in a local hydroelectric powerhouse who suffered from hearing loss due to noise were included in the study. Study and control groups were composed of 28 employees (mean age 37+/-5 years) and 30 voluntary subjects (mean age 36+/-4 years), respectively. All the subjects in patient and control groups were males. Blood samples were obtained from all subjects and vitamin A, E, B12 and folic acid levels were measured.
  
  
  RESULTS
  Level of vitamin B12 was found low in the patient group and normal in the control group and these were found statistically significant (p<0.005). There were no significant differences between vitamin A, E and folic acid levels.
  
  
  CONCLUSIONS
  We think that measurement of vitamin B12 in routine control of the people who are working in noisy environment may be useful.
authors: Department of Otolaryngology, Medicine Faculty of Firat University, Firat Medical Center, Elaziğ, Turkey. uzeyirgok@yahoo.com
authors: Uzeyir
authors: U
authors: Gök
authors: Ihsan
authors: I
authors: Halifeoğlu
authors: Mücahit
authors: M
authors: Yildiz
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D005492:Folic Acid / Q000097:blood; D006317:Hearing Loss, Noise-Induced / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000097:blood*; D014801:Vitamin A / Q000097:blood; D014805:Vitamin B 12 / Q000097:blood*; D014810:Vitamin E / Q000097:blood
chemical_list: D014801:Vitamin A; D014810:Vitamin E; D005492:Folic Acid; D014805:Vitamin B 12