Tympanometry of a diverse group of preschool aged children.
OBJECTIVE
Ethnicity has been previously described as a risk factor for middle ear disease. Little data exist on the presence of middle ear disease based on tympanometry screening comparing Asian children and children of other races.


METHODS
Two hundred and seventy children aged 3-5 were screened with tympanometry at six Head Start sites in St. Paul, Minnesota during the months of September and October of 2004. Gender, age, and race/ethnicity was recorded and entered into a database, along with values for canal volume, static admittance, peak pressure, and tympanometric width.


RESULTS
Criteria for abnormal tympanometry were based on American Speech-Language Hearing Association (ASHA) recommendations for a failed tympanogram for 1-5 year olds (admittance <0.3 mmho or width >200 daPa). There were no statistically significant differences in failure rates between males and females. There were, however, more failures for Asian (predominantly Hmong) children compared to children of other races/ethnicities after adjusting for age and gender differences (OR=6.39, CI 3.65-11.2, p<0.001) and for children <4-years-old compared to children 4-5-years-old after adjusting for race and gender differences (OR=1.99, CI 1.03-3.84, p<0.05).


CONCLUSIONS
Asian children were more than six times as likely to fail tympanometry as children of other races/ethnicities. The explanation for this difference is likely to be multifactorial, and further research is needed to characterize this difference.
University of Minnesota, Department of Otolaryngology, MMC 396, 420 Delaware St SE, Minneapolis, MN 55455, USA. stri0106@umn.edu <stri0106@umn.edu>
Abby C
AC
Meyer
Kathryn J
KJ
Webb
Cynthia S
CS
Davey
Kathleen A
KA
Daly
D000158:Acoustic Impedance Tests; D002675:Child, Preschool; D004427:Ear Diseases / Q000175:diagnosis / Q000453:epidemiology; D004432:Ear, Middle; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D044469:Racial Groups