Table 2

Comparison of interpeak latencies (IPL) (ms) and amplitude ratio (V/I) of BAEP of the right ear between drug abusers (n=58) and controls (n=30).

IPL of right ear	Cases		Controls		t-value	p-value
IPL of right ear	Mean	SD	Mean	SD	t-value	p-value
I-III	2.16	0.13	2.31	0.19	4.26	0.0001^**
I-V	4.01	0.3	4.15	0.24	2.19	0.03^*
III-V	1.93	0.28	1.82	0.08	2.10	0.04^*
V/I	171.96	245.71	159.10	146.6	0.26	0.79^***