title: The 6 kHz acoustic dip in school-aged children in Finland.
abstract: In the present study, pure-tone audiometry was used in 687 Finnish school children, aged 6-15 years, to determine the prevalence of a 6 kHz acoustic dip and related factors among three age groups. Trained audiometricians tested air conduction thresholds in a sound-proof room. A total of 57 children (8.3%) had a clear-cut dip of at least 20 dB at 6 kHz. This dip was more pronounced in older children and in boys. A thorough case history was obtained by questionnaire, with logistic regression analysis showing that low birth weight (< 2500 g) and childhood measles were the only factors associated with occurrence of the 6 kHz dip in school-aged children.
authors.affiliation: Department of Otolaryngology, University Central Hospital of Turku, Finland.
authors.forename: J
authors.initials: J
authors.lastname: Haapaniemi
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D001724:Birth Weight; D002648:Child; D005260:Female; D005387:Finland / Q000453:epidemiology; D006316:Hearing Loss, High-Frequency / Q000453:epidemiology*; D006319:Hearing Loss, Sensorineural / Q000453:epidemiology; D006801:Humans; D016015:Logistic Models; D008297:Male; D008457:Measles / Q000453:epidemiology; D015995:Prevalence; D012044:Regression Analysis; D012307:Risk Factors; D012737:Sex Factors; D012959:Socioeconomic Factors