BioMed Research International

Research Article

Changes in Spatial Working Memory in Stable Chronic Obstructive Pulmonary Disease: A Retrospective Study

Table 1

Demographic characteristics of the participants.


Characteristics	COPD ()	HC ()

Age (years),			0.992
Sex (male), (%)	26 (89.7)	25 (75.8)	0.153
Education (years),			0.927
Disease duration (years),		NA
History of smoking, (%)	26 (89.7)	NA
History of alcohol, (%)	9 (31.0)	NA
Blood gas analysis,
PaO₂ (mmHg)		NA
PaCO₂ (mmHg)		NA
SaO₂ (%)		NA
Pulmonary function,
FEV1 (L/sec)		NA
FVC (L)		NA
FEV1/FVC (%)		NA
HAMA,			0.027
HAMD,			0.078

PaO₂: arterial oxygen tension; PaCO₂: arterial carbon dioxide tension; SaO₂: arterial oxygen saturation; FEV1: forced expiratory volume in one second; FVC: forced vital capacity; FEV1/FVC: forced vital capacity/forced expiratory volume in one second. HAMA: Hamilton anxiety rating scale; HAMD: Hamilton depression rating scale; COPD: chronic obstructive pulmonary disease; HC: healthy control; NA: not applicable.