Table 2.

Ribbon analysis of morphologically subgrouped IHCs

Number of IHCs	Type-A IHCs		Type-B IHCs
	21/26/30 (UE/85dB/91dB)		12/17/16 (UE/85dB/91dB)
Basolateral pole position	Pillar	Modiolar	Pillar	Modiolar
Ribbon synapse countsa (UE/85dB/91dB)	6.1 ± 1.6/6.6 ± 1.7/5.6 ± 1.4	10.9 ± 2.2/11.7 ± 2.7/6.9 ± 2.3	13.2 ± 2.1/14.6 ± 2.0/8.7 ± 3.2	3.8 ± 1.2/3.4 ± 1.5/2.3 ± 1.6
Wilcoxon rank-sum test (UE vs. 91dB/UE vs. 85daysB/85dB vs. 91dB)	p = 0.2110/p = 0.4014/p = 0.0285	p < 0.0001/p = 0.3883/p < 0.0001	p = 0.0008/p = 0.1122/p < 0.0001	p = 0.0130/p = 0.4995/p = 0.0463
Mean volume of ribbons (μm3)b(UE/85dB/91dB)	0.0091 ± 0.0004/0.0121 ± 0.0005/0.0152 ± 0.0008	0.0142 ± 0.0005/0.0152 ± 0.0004/0.0174 ± 0.0009	0.0135 ± 0.0007/0.0151 ± 0.0004/0.0231 ± 0.0018	0.0153 ± 0.0011/0.0141 ± 0.0008/0.0130 ± 0.0021
Wilcoxon rank-sum test (UE vs. 91dB/UE vs. 85daysB/85dB vs. 91dB)	p < 0.0001/p = 0.0002/p = 0.0059	p = 0.0163/p = 0.2895/p = 0.1600	p = 0.0001/p = 0.0968/p = 0.0001	p = 0.5310/p = 0.4127/p = 0.8430
Inter-ribbon distance (μm)b (UE/85dB/91dB)	3.36 ± 0.13/3.32 ± 0.11/3.44 ± 0.15	2.16 ± 0.08/2.22 ± 0.06/2.98 ± 0.16	2.41 ± 0.08/2.48 ± 0.08/2.80 ± 0.18	3.72 ± 0.38/3.62 ± 0.24/3.89 ± 0.37
Wilcoxon rank-sum test (UE vs. 91dB/UE vs. 85daysB/85dB vs. 91dB)	p = 0.9470/p = 0.5279/p = 0.6400	p = 0.0004/p = 0.6922/p = 0.0004	p = 0.0794/p = 0.6430/p = 0.1320	p = 0.4060/p = 0.9417/p = 0.2540

^aData are represented as mean ± SD.

^bData are represented as mean ± SEM.