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. Author manuscript; available in PMC: 2021 Nov 12.

Published in final edited form as: Braz J Otorhinolaryngol. 2017 Jan 23;84(2):150–158. doi: 10.1016/j.bjorl.2016.12.004

Table 3.

Mean and p value of interpeak intervals (in ms) I-II, II-III, III-IV and I-IV of BAEP for the Group Effect.

Group Effect (n = 30)	Interpeak intervals (ms)
	I-II Exposure		II-III Exposure		III-IV Exposure		I-IV Exposure
	Pre	Post	Pre	Post	Pre	Post	Pre	Post
Control	1.178	0.873	0.852	0.773	1.477	1.246	3.507	2.892
100 mg/L Pb	0.986	0.912	0.823	0.809	1.493	1.203	3.302	2.924
100 mg/L Pb + FeSO₄	1.097	0.808	0.739	0.715	1.423	1.097	3.259	2.620
400 mg/L Pb	1.021	0.909	0.836	0.721	1.401	1.160	3.258	2.790
400 mg/L Pb + FeSO₄	1.161	0.897	0.801	0.685	1.413	1.162	3.375	2.744
FeSO₄	1.181	0.923	0.701	0.726	1.670	1.173	3.552	2.822
p	0.011^a	0.131	0.384	0.200	0.192	0.270	0.143	0.033^a

Pre, Pre-exposure to Pb; Post, Post-exposure to Pb; ms, milliseconds.

^a

p obtained from the comparison of the groups at each time (pre and post-exposure to Pb).