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  • Title: Effects of changes in click-evoked otoacoustic emission (CEOAE) pass criteria, as used in the English newborn hearing screening program, on screening outcome.
    Author: Stevens J, Brandreth M, Bacon P.
    Journal: Int J Audiol; 2014 Sep; 53(9):613-7. PubMed ID: 24825366.
    Abstract:
    OBJECTIVE: There were two objectives, firstly what effect does a change in the pass criteria of a click-evoked otoacoustic emission (CEOAE) newborn hearing screen have on the number of cases of significant hearing impairment detected by follow up diagnostics, and secondly how does this change affect the screen pass rate? DESIGN: Changes in the pass criteria were: reduction in the signal-to-noise ratio (SNR); reduction in the minimum signal level (MSL); inclusion of the 1-kHz half-octave band; reduction from two to a single half-octave band. STUDY SAMPLE: Data from three screening sites was used within the English newborn hearing screening program from the period 2002 to 2006, with a total number of births of about 40,000. There were 42 bilateral and 43 unilateral cases of significant hearing impairment. RESULTS: No effect on the number of cases detected by follow up diagnostics was observed when: (1) SNR was reduced to a minimum of 5 dB; (2) MSL was reduced to -10 dB SPL; and (3) the 1-kHz band was included. With all these changes the percentage pass rate improved by 0.36%. CONCLUSIONS: The current choice of SNR and MSL criteria appears robust. Only a small increase in pass rate is possible without affecting case detection.
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