![]() There are two standard models of interpretation commonly used for an APD evaluation in the United States, the Buffalo Model ( Katz et al, 1992) and the Bellis and Ferre Model ( Bellis and Ferre, 1999). However, both ASHA and AAA have published position statement describing recommended diagnostic evaluations of testing ( ASHA, 2005 AAA, 2010). The lack of standardized clinical protocol has been a major obstacle for population-based APD research. Although the knowledge regarding APD improved in recent years ( ASHA, 2005 AAA, 2010), there is no universally agreed protocol for both its screening and diagnosis ( ASHA, 1996). ![]() One of the likely reasons why different prevalence rates have been reported in the literature is due to the test battery and criteria used to assess and define APD. In children, the reported prevalence is ~3–5%, although some speculate that APD is over-diagnosed ( Silman et al, 2000). Previous estimations of the prevalence of APD in the general population varied widely from 0.5% to 10% ( Chermak et al, 1997 Bamiou et al, 2001 Hind et al, 2011). The prevalence and demographic characteristics of pediatric APD are still not precisely known. The results of this study raise the importance of adapting the APD test battery for children with a different linguistic background as well as increasing awareness of available clinical resources to all families in our area.Ĭhildren with auditory processing disorder (APD) have difficulty understanding speech (especially in degraded listening environments) despite audiometrically normal hearing. The low percentage of Hispanic or African American children referred to the clinic for APD evaluations may be related to the socioeconomic status and linguistic differences among the concerned families. Hence, the current estimate is likely an underestimate of the actual APD prevalence. The findings of higher prevalence rates among the children attending private schools and higher proportion of Caucasians children referred for APD evaluation suggest that more children among those in public schools and in the Hispanic and African American groups should have been referred for an APD evaluation. We also found a significant difference in APD prevalence depending on the school types. ![]() The difference might be due to the diagnosis criteria of APD among studies as well as the use of school enrollment number as the referenced population to estimate prevalence in our study. ![]() The estimated prevalence of APD in the current study was lower than the previously published estimates. ![]()
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