Table 2.

Total gray matter and white matter volume

	COPD	Control	p
Total GM volume	0.68 ± 0.048	0.71 ± 0.06	0.15
Total WM volume	0.52 ± 0.04	0.53 ± 0.05	0.42
Brain Parenchyma	1.21 ± 0.09	1.24 ± 0.11	0.25

GM, gray matter; WM, white matter.