Table 1 The mean and standard deviation (minimum to maximum) of FA and MD (× 10⁻³ mm²/s) values of the white matter tracts in patients with severe COPD and the controls

 SLF

0.31 ± 0.06 (0.20–0.43)

0.40 ± 0.04 (0.32–0.48)

p < 0.001*

 IOFF

0.33 ± 0.07 (0.20–0.45)

0.43 ± 0.03 (0.37–0.50)

p < 0.001*

 UF

0.27 ± 0.05 (0.19–0.37)

0.36 ± 0.04 (0.30–0.42)

p < 0.001*

 CING

0.28 ± 0.05 (0.20–0.38)

0.38 ± 0.04 (0.30–0.44)

p < 0.001*

 OR

0.32 ± 0.07 (0.21–0.44)

0.42 ± 0.03 (0.37–0.48)

p < 0.001*

 GCC

0.51 ± 0.08 (0.36–0.63)

0.61 ± 0.06 (0.51–0.72)

p < 0.001*

 SCC

0.50 ± 0.07 (0.38–0.61)

0.63 ± 0.07 (0.52–0.73)

p < 0.001*

 SLF

1.15 ± 0.17 (0.89–1.42)

0.81 ± 0.05 (0.74–0.93)

p < 0.001*

 IOFF

1.11 ± 0.15 (0.84–1.35)

0.80 ± 0.05 (0.71–0.91)

p < 0.001*

 UF

1.18 ± 0.14 (0.95–1.41)

0.86 ± 0.07 (0.78–1.00)

p < 0.001*

 CING

1.17 ± 0.13 (0.94–1.39)

0.83 ± 0.07 (0.73–0.96)

p < 0.001*

 OR

1.08 ± 0.24 (0.10–1.42)

0.84 ± 0.07 (0.74–0.97)

p < 0.001*

 GCC

0.97 ± 0.09 (0.80–1.12)

0.82 ± 0.04 (0.74–0.92)

p < 0.001*

 SCC

0.99 ± 0.11 (0.79–1.21)

0.81 ± 0.04 (0.73–0.90)

p < 0.001*