Table 2.

Comparison of P50, N100 and P200 parameters between control and patient groups.

	Controls (n=102)		Patients (n=104)		GLM*		Cohen’s d
	Mean	SD	Mean	SD	F(4,200)	P
P50 S1	2.328	1.006	2.316	1.136	0.006	0.94	0.011
P50 S2	1.042	0.628	1.362	0.874	9.275	0.003	0.42
P50 ratio (S2/S1)	0.518	0.381	0.664	0.432	5.652	0.019	0.358
P50 difference (S1-S2)	1.285	1.072	0.955	1.102	3.333	0.069	0.304
N100 S1	6.785	3.382	4.984	2.628	18.378	<0.001	0.595
N100 S2	2.171	1.190	2.370	1.573	1.039	0.309	0.142
N100 ratio	0.363	0.232	0.658	0.885	9.550	0.002	0.453
N100 difference	4.613	3.367	2.614	2.867	16.367	<0.001	0.639
P200 S1	11.8	6.051	7.904	4.036	29.529	<0.001	0.759
P200 S2	4.086	1.988	4.140	2.083	0.035	0.851	0.026
P200 ratio	0.390	0.215	0.597	0.318	26.318	0.001	0.763
P200 difference	7.714	5.371	3.674	3.93	27.693	<0.001	0.841

*Controlling for age, education, smoking amount, and retained pairs.