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

Figure 2

Correlation analysis between PaO₂, PaCO₂, and cognitive functions. (a–c) There were positive correlations between PaO₂ and MoCA (, ), immediate recall (, ), and 1-back accuracy (, ) in the COPD group. (d) There was a negative correlation between PaO₂ and Stroop test (, ) (longer reaction time means poorer executive function). (e, f) There were negative correlations between PaCO₂ and VFT (, ) and 1-back accuracy (, ).

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