The Egyptian Journal of Neurology, Psychiatry and Neurosurgery

Table 1 Comparison between P300 and TMT in cases and controls

From: Can electrophysiological tests be used as screening tools in detection of cognitive impairment in obstructive sleep apnea hypopnea syndrome?

	Before sleep					After sleep
	Cases (n = 20)		Control (n = 20)		P value	Cases (n = 20)		Control (n = 20)		P value
	Mean	SD	Mean	SD	P value	Mean	SD	Mean	SD	P value
P300 L (ms)	346.15	27.39	371.00	28.84	0.018*	369.85	22.92	351.60	26.27	0.02*
P300 A (μV)	12.00	7.87	9.16	5.33	0.289	16.20	9.67	10.07	5.81	0.013*
Mean RT (ms)	507.30	131.85	491.65	78.31	0.221	596.95	135.84	464.30	93.65	0.003*
TMT A (s)	89.80	40.39	80.50	29.71	0.718	70.40	38.20	73.05	25.39	0.369
TMT B (s)	122.60	32.05	118.75	29.94	0.698	103.95	29.48	101.85	29.34	0.64

L latency, ms millisecond, A amplitude, μV microvolt, RT reaction time, TMT trail making test, s second
*Statistically significant

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