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Updated: Feb 21, 2026
Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
Published on: March 14, 2013
Immediate test-retest reliability and agreement of wideband absorbance results in infants
Katrina Moon1, Sreedevi Aithal1, Venkatesh Aithal1
1Hearing Research Unit for Children, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Australia.
Objective:
The present study aimed to evaluate immediate test-retest reliability and agreement of wideband absorbance (WBA) results in infants.
Design:
A cross-sectional study design was used. Retest for WBA was performed with the probe removed and replaced in the same ear, immediately following the initial measurement. Study sample: A total of 25 infants aged 6-18 months, who passed both tympanometry and distortion product otoacoustic emission tests, participated in this study.
Results:
Generalized linear mixed model analyses showed no significant difference in WBA between the test and retest conditions. Intraclass correlation coefficients (ICCs) were greater than 0.92 for all but the 250-Hz band, where an ICC of 0.75 with a 95% confidence interval of 0.42-0.89 was obtained. Bland-Altman plots showed mean test-retest differences of less than or equal to 0.0167, with 95% of the data points within the limits of agreement for all frequency bands. Conclusion: Overall, excellent test-retest reliability and agreement of WBA results in infants were established. Although the frequency band of 250 Hz was found to have an ICC consistent with moderate reliability, this region is considered to carry minimal diagnostic information. Findings from this study support the use of WBA with infants for clinical evaluation.
