Table 2.

Summary of analyses of covariance for all significant main effects of group reported in the manuscript

Variable	F value	P value	Effect size
YNH vs. ONH
CO	8.752	0.006	0.240
STR	6.146	0.02	0.185
P1 AMP	2.870	0.10	0.098
P1b AMP	16.346	< 0.001	0.384
P2 LAT	39.345	< 0.001	0.611
P1b LAT	111.367	< 0.001	0.817
ONH vs. OHI
N1 AMP	6.762	0.016	0.200
P1 LAT	3.533	0.072	0.128

The YNH vs. ONH comparison covaried for high-frequency pure-tone average and the ONH vs. OHI comparison covaried for age

CO 50 % crossover point, STR stimulus-to-response correlation, P1 AMP P1 amplitude, P1b AMP P1b amplitude, P2 LAT P2 latency, P1b LAT P1b latency, N1 AMP N1 amplitude, P1 LAT P1 latency