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Author Lie, A.; Engdahl, B.; Hoffman, H.J.; Li, C.-M.; Tambs, K. url  doi
  Title Occupational noise exposure, hearing loss, and notched audiograms in the HUNT Nord-Trondelag hearing loss study, 1996-1998 Type Journal Article
  Year 2017 Publication The Laryngoscope Abbreviated Journal Laryngoscope  
  Volume 127 Issue 6 Pages 1442-1450  
  Keywords Adult; Aged; Aged, 80 and over; Audiometry/*statistics & numerical data; Female; Hearing Loss, Noise-Induced/*epidemiology/etiology; Humans; Male; Middle Aged; Noise, Occupational/*adverse effects; Norway/epidemiology; Occupational Diseases/*epidemiology/etiology; Occupational Exposure/*adverse effects; Prevalence; Sex Distribution; Young Adult; Noise; noise-induced hearing loss; notched audiograms; occupation  
  Abstract OBJECTIVES/HYPOTHESIS: To study the prevalence and usefulness of audiometric notches in the diagnosis of noise-induced hearing loss (NIHL). STUDY DESIGN: Audiograms and data on noise exposure from 23,297 men and 26,477 women, aged 20 to 101 years, from the Nord-Trondelag Hearing Loss Study, 1996-1998. METHODS: The prevalence of four types of audiometric notches (Coles, Hoffman, Wilson) and 4 kHz notch were computed in relation to occupational noise exposure, age, sex, and report of recurrent ear infections. RESULTS: The prevalence of notches in the 3 to 6 kHz range (Wilson, Hoffman, and Coles) ranged from 50% to 60% in subjects without occupational noise exposure, and 60% to 70% in the most occupationally noise-exposed men. The differences were statistically significant only for bilateral notches. For 4 kHz notches, the prevalence varied from 25% in occupationally nonexposed to 35% in the most occupationally exposed men, and the differences were statistically significant for both bilateral and unilateral notches. For women, the prevalence of notches was lower than in men, especially for 4 kHz notches, and the differences between occupationally noise exposed and nonexposed were smaller. Recreational exposure to high music was not associated with notched audiograms. CONCLUSIONS: The detection of bilateral notches and unilateral 4 kHz notches is of some value in diagnosing NIHL, especially in men. LEVEL OF EVIDENCE: 4 Laryngoscope, 127:1442-1450, 2017.  
  Address Division of Mental Health, Norwegian Institute of Public Health, Oslo, Norway  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0023-852X ISBN Medium  
  Area Expedition Conference  
  Notes PMID:27696439; PMCID:PMC5484347 Approved no  
  Call Number HUNT @ maria.stuifbergen @ Serial 1948  
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