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Original Article

Test-retest reliability of distortion-product otoacoustic emissions in children with normal hearing: A preliminary study

Confiabilidad test-retest de las emisiones otocústicas por productos de distorsión en niños con audición normal: Estudio preliminar

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Pages 351-354 | Received 12 Sep 2007, Published online: 07 Jul 2009
 

Abstract

The test-retest reliability of DPOAEs was investigated in 24 children (43 ears) with normal hearing at five F2 frequencies (2530, 3561, 5014, 7029, and 10 028 Hz). Two DPOAE recordings were performed on the same subjects in the same location using the same equipment. The second recordings were made 13 to 15 days after the first recording. The DPOAE level recorded in the subjects ranged between -13.10 and 20.20 dB for all the five frequencies. The variation in DPOAE level was greater at 10 028 Hz than at other frequencies. The mean difference between the test and retest recordings was 0.52±2.87, −1.57±4.62, 0.01±3.38, −0.55±2.85, and −0.56±5.57dB at 2530, 3561, 5014, 7029, and 10 028 Hz, respectively. The intra-correlation coefficients for DPOAE level at each of the five (F2) frequencies were 0.85, 0.68, 0.62, 0.89, and 0.64 respectively. Calculations of mean +2SD showed that retest recordings greater than 6.26, 7.67, 6.81, 5.15, and 10.58 dB SPL at 2530, 3561, 5014, 7029, and 10 028 Hz respectively could possibly be interpreted as a significant change in status of the ear.

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Corrigendum

Sumario

Se investigo la confiabilidad test-retest de las DPOAE en 24 niños (43 oídos) con audición normal en 5 frecuencias F2 (2530, 3561, 5014, 7029 y 10028 Hz). Se realizaron dos registros de DPOAE en el mismo sujeto, en el mismo lugar y con la utilización el mismo equipo. El segundo registro se realizó 13 a 15 días después del primero. El nivel de las DPOAE registrado en los sujetos varió entre – 13.10 y 20.20 dB en las cinco frecuencias. La variación en el nivel de las DPOAE fue mayor en 10028 Hz que en las otras frecuencias. La diferencia media entre los registros de test y retest fue de 0.52±2.87, −1.57±4.62, 0.01±3.38, −0.55±2.85, y −0.56±5.57dB en 2530, 3561, 5014, 7029, y 10 028 Hz, respectivamente. Los coeficientes de intra-correlación para el nivel de las DPOAE en cada una de las cinco frecuencias (F2) fueron 0.85, 0.68, 0.62, 0.89 y 0.64 respectivamente. Los cálculos de la media +2DE mostraron que los registros de retest mayores que 6.26, 7.67, 6.81, 5.15, y 10.58 dB SPL en 2530, 3561, 5014, 7029, y 10 028 Hz respectivamente, pueden interpretarse como un cambio significativo en el estado del oído.

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