Table 3.

Correlation analysis between clinical parameter and cognitive functions of COPD patients.

	PaO2		PaCO2		FEV1/FVC
	r	P	r	P	r	P
Global cognitive function
MoCA	0.375	0.045	-0.185	0.336	0.183	0.341
Short term memory
DS-forward	0.238	0.156	-0.044	0.798	0.075	0.658
AVLT immediate recall	0.602	0.001	-0.143	0.461	-0.121	0.531
Long term memory
AVLT delay recall	0.354	0.059	-0.064	0.743	0.126	0.514
Executive function
Stroop interference test	-0.375	0.045	0.160	0.407	0.015	0.939
VFT fruits and vegetables	0.194	0.314	-0.397	0.033	0.183	0.343
Working memory
Primary task
0-back ACC	0.040	0.838	0.138	0.476	-0.012	0.949
0-back RT	0.407	0.028	-0.213	0.268	-0.209	0.278
Advanced task
1-back ACC	0.517	0.004	-0.404	0.030	-0.083	0.670
1-back RT	-0.005	0.978	-0.073	0.707	0.029	0.882
2-back ACC	0.114	0.557	-0.208	0.278	0.094	0.628
2-back RT	-0.193	0.316	-0.105	0.586	0.133	0.490

MoCA: Montreal Cognitive Assessment Test; DS: digit span test; CAVLT: Chinese Auditory Verbal Learning Test; VFT: Verbal Fluency Test; ACC: accuracy; RT: reaction time.