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Table 2 Audiological results of infants diagnosed with AN from first ABR to last audiological evaluation. Mean age (months) ± standard deviation at evaluation are reported for each test

From: Isolated auditory neuropathy at birth in congenital cytomegalovirus infection

AN Patients n. First ABR Right ear Left ear 3.69 ± 2.80 months Second ABR Right ear Left ear 7.56 ± 2.87 months Third ABR Right ear Left ear 11.83 ± 4.58 months Fourth ABR Right ear Left ear 17.00 ± 2.83 months Last audiological test 32.44 ± 17.58 months
1 70 dB 50 dB 70 dB 40 dB 40 dB 40 dB 30 dB 30 dB Normal
2 50 dB 30 dB 30 dB 30 dB Normal
3 30 dB 50 dB 30 dB 30 dB Normal
4 40 dB 70 dB 30 dB 30 dB Normal
5 40 dB 80 dB 30 dB 40 dB 30 dB 30 dB Normal
6 40 dB 30 dB 30 dB 30 dB Normal
7 50 dB 30 dB 50 dB 30 dB 30 dB 30 dB Normal
8 40 dB 50 dB 30 dB 30 dB Normal
9 40 dB 30 dB 30 dB 30 dB Normal
10 50 dB 30 dB 40 dB 40 dB 30 dB 30 dB Normal
11 50 dB 70 dB 70 dB 70 dB 30 dB 30 dB Normal
12 50 dB 40 dB 30 dB 30 dB Normal
13 40 dB 30 dB 50 dB 40 dB 50 dB 70 dB 40 dB 30 dB Normal
14 50 dB 30 dB 30 dB 30 dB Normal
15 30 dB 50 dB 30 dB 30 dB Normal
16 40 dB 30 dB 30 dB 30 dB Normal
  1. AN Auditory neuropathy, ABR Auditory Brainstem Response, dB Decibel normal hearing level. Normal hearing thresholds are highlighted in bold characters