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Research Article

Hearing in a 54- to 66-year-old population in northern Finland

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Pages 920-927 | Received 08 Nov 2009, Accepted 18 Jul 2010, Published online: 14 Sep 2010
 

Abstract

Abstract

There are only a few large, population-based epidemiological studies on hearing impairment (HI) in adults. The objective of this study was to investigate the prevalence of HI and possible differences between ears in older adults. The subjects (n = 850), aged 54–66 years, were randomly sampled from the population register. A questionnaire survey, an otological examination, and pure-tone audiometry were performed. Another questionnaire was mailed to collect information on non-participants. The prevalence of HI averaged over the frequencies of 0.5, 1, 2, and 4 kHz for the better ear ≥20 dB HL was 26.7% (men: 36.8%, women: 18.4%). There was no difference between left and right ear pure-tone averages over the frequencies 0.5, 1, 2, and 4 kHz (PTA0.5–4 kHz), but a significant difference of −0.8 dB HL was found for the low frequencies 0.125, 0.25, and 0.5 kHz (PTA0.125–0.5 kHz), and 4.4 dB HL for the high frequencies over 4, 6, and 8 kHz (PTA4–8 kHz). In conclusion, HI was a highly prevalent finding in this age group.

Sumario

Existen pocos estudios epidemiológicos grandes, basados en la población, sobre impedimentos auditivos (HI) en adultos. El objetivo de este estudio fue investigar la prevalencia de HI y posibles diferencias entre los oídos de adultos mayores. La muestra de sujetos (n = 850), con edades de 54–66 años, se hizo al azar, a partir de registros de población. Se aplicó un cuestionario y se realizó un examen otológico y una audiometría de tonos puros. Otro cuestionario fue enviado por correo para colectar información de los no participantes. La prevalencia de HI promediada en las frecuencias de 0.5, 1, 2, y 4 kHz en el mejor oído, >20 dB HL, fue de 26.7% (hombres: 36.8%; mujeres: 18.4%). No hubo diferencia entre los promedios con tonos puros en oídos derecho o izquierdo en las frecuencias de 0.5, 1, 2, y 4 kHz (PTA 0.5–4 kHz), pero si una diferencia significativa de -0.8 dB HL, encontrada en las frecuencias graves de 0.125, 0.25 y 0.5 kHz (PTA 0.125–0.5 kHz), y 4.4 dB HL en las frecuencias agudas de 4, 6 y 8 kHz (PTA 4–8 kHz). En conclusión, el HI fue un hallazgo altamente prevalente en este grupo de edad.

Acknowledgements

We thank all the subjects who participated in this study. We would also like to thank the staff of the Hearing Centre at the Oulu University Hospital, and other staff who helped us to conduct the project. The authors would like to express their gratitude to the ARHI partners. This study was supported by the European ARHI Project (QLRT-2001-00331).

Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

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