Skip to main content
. 2015 Mar 30;10(3):e0121520. doi: 10.1371/journal.pone.0121520

Table 5. Correlation of T1 mapping at room air and with 100% O2, and perfusion with COPD severity.

Cases n r p
GOLD vs. Perfusion 18 0.52 <0.05
GOLD vs. T1 20 0.45 <0.05
GOLD vs. ΔT1 20 0.52 <0.05

Spearman rank order correlation coefficient r calculated for abnormal T1 at room air (T1), abnormal T1 shortening with pure O2 (ΔT1) and perfusion alterations (Perfusion), with COPD stage in a per-patient approach.