The Egyptian Journal of Neurology, Psychiatry and Neurosurgery

Table 7 Correlation between COPD severity and evoked potentials (visual and auditory)

From: Electrophysiological biomarkers of central nervous system affection in cases of chronic obstructive pulmonary disease (COPD)

		GOLD
		R	P value
BAEP I latency	Right	0.93	< 0.001*
BAEP I latency	Left	0.94	< 0.001*
BAEP II latency	Right	0.3	0.06(NS)
BAEP II latency	Left	0.26	0.10(NS)
BAEP III latency	Right	0.92	< 0.001*
BAEP III latency	Left	0.65	< 0.001*
BAEP IV latency	Right	0.38	0.016
BAEP IV latency	Left	0.24	0.12(NS)
BAEP V latency	Right	0.16	0.33(NS)
BAEP V latency	Left	− 0.07	0.68(NS)
IPL I–III	Right	0.01	0.93(NS)
IPL I–III	Left	− 0.49*	0.001*
IPL I–V	Right	− 0.66	< 0.001*
IPL I–V	Left	− 0.75*	< 0.001*
IPL III–IV	Right	− 0.62	< 0.001*
IPL III–IV	Left	− 0.54	< 0.001*
BEAP I amplitude	Right	0.001	0.99(NS)
BEAP I amplitude	Left	− 0.07	0.68(NS)
BEAP V amplitude	Right	− 0.12	0.47(NS)
BEAP V amplitude	Left	0.13	0.42(NS)
P100 right	Latency	0.12	0.44(NS)
P100 right	Amplitude	0.10	0.54(NS)
P100 left	Latency	0.09	0.58(NS)
P100 left	Amplitude	0.10	0.55(NS)

IPL interpeak latency difference, NS non significant, *significant

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