GM Adjudin n   7 days
40 mg/kg Negative 9(8) Frequency average of shifts (dB) 8 ± 0.4
OHC loss % in basal turn 31 ± 0.3
OHC loss % in apical turn 10 ± 0.5
60 mg/kg Negative 9(9) Frequency average of shifts (dB) 33 ± 2
OHC loss % in basal turn 75 ± 1
OHC loss % in apical turn 52 ± 1
The frequency average of shifts was calculated by an average the threshold shift in each tested frequency, the percentage value of OHC loss was calculated as the result of lost OHCs divided by the total OHCs in the corresponding area. n = sample size (survived animals). Apical turn is the region of basilar membrane from 0 to 2.4 mm (begin at apex); basal turn is the region of basilar membrane from 2.4 to 5.2 mm.
Table 2: Threshold shifts of ABR tests and percentage OHC loss by regimen and observation stage in mice.