. 2024 Jan 1;20(1):35–43. doi: 10.5152/iao.2024.231142

Table 1.

Comparison of Preexposure and Postexposure Auditory Brainstem Response Threshold Measurements

Group		Preexposure ABR Threshold	Postexposure ABR Threshold	P ²
Control	Mean + SD	11.8 ± 3.7	12.1 ± 3.8	.752
Control	Median (minimum–maximum)	10 (10-20)	10 (10-20)^a
0.6 V/m	Mean + SD	10.8 ± 2.9	12.5 ± 4.5	.346
0.6 V/m	Median (minimum–maximum)	10 (10-20)	10 (10-20)^a
1.9 V/m	Mean + SD	10.5 ± 1.6	13.5 ± 4.7	.129
1.9 V/m	Median (minimum–maximum)	10 (10-15)	10 (10-20)^a
5 V/m	Mean + SD	12.5 ± 3.9	15.0 ± 6.4	.193
5 V/m	Median (minimum–maximum)	10 (10-20)	12.5 (10-30)^ab
10 V/m	Mean + SD	10.8 ± 1.9	18.3 ± 5.4	.005
10 V/m	Median (minimum–maximum)	10 (10-15)	20 (10-30)^b
15 V/m	Mean + SD	12.1 ± 3.9	20.4 ± 4.5	.007
15 V/m	Median (minimum–maximum)	10 (10-20)	20 (10-30)^b
P ¹		.559	<.001

Bold values in P-value row indicate statistically significant difference.

ABR, auditory brainstem response; V/m, volt/meter.

¹Comparison of preexposure measurements and postexposure measurements between groups (Kruskal–Wallis test with Dunn test).

²Comparison of preexposure and postexposure thresholds in each group (Wilcoxon signed rank test).

^a-b There is no statistically significant difference in the comparison of post-exposure thresholds between groups with the same letter.