Table 6

Mean amplitudes (in μV) of click evoked auditory brainstem responses, standard deviations (SD) and the results of t test
Age
 Parameter
 Group
 Mean
 SD
 t
 p
3 years
 Wave I
 Control
 0.41
 0.13
 2.751
 <0.01


Experimental
 0.30
 0.13


Wave III
 Control
 0.30
 0.10
 2.619
 <0.05


Experimental
 0.20
 0.14


Wave V
 Control
 0.59
 0.17
 1.986
 >0.05


Experimental
 0.50
 0.17


V/I amplitude ratio
 Control
 1.61
 0.51
 0.131
 >0.05


Experimental
 2.08
 1.25

4 years
 Wave I
 Control
 0.56
 0.32
 0.409
 >0.05


Experimental
 0.31
 0.21


Wave III
 Control
 0.43
 0.17
 1.121
 >0.05


Experimental
 0.30
 0.17


Wave V
 Control
 0.54
 0.15
 0.516
 >0.05


Experimental
 0.50
 0.26


V/I amplitude ratio
 Control
 1.77
 2.25
 0.769
 >0.05


Experimental
 1.85
 0.95

5 years
 Wave I
 Control
 0.29
 0.16
 0.044
 >0.05


Experimental
 0.31
 0.18


Wave III
 Control
 0.26
 0.14
 0.165
 >0.05


Experimental
 0.34
 0.30


Wave V
 Control
 0.65
 0.22
 0.609
 >0.05


Experimental
 0.49
 0.22


V/I amplitude ratio
 Control
 2.38
 1.99
 0.326
 >0.05


Experimental
 2.88
 2.13

Maruthy and Mannarukrishnaiah Behavioral and Brain Functions 2008 4:17   doi:10.1186/1744-9081-4-17