Correlations between rate of 18F-fluorodeoxyglucose uptake classified by lung regions in participants with COPD

Variable (x)Upper lungMiddle lungLower lung
Fibrinogen g·L−10.42<0.0010.38<0.0010.160.16
Log10hsCRP mg·L−10.310.0050.310.0050.090.41
White cell count ×109·L−
Neutrophils ×109·L−10.310.0050.290.0090.190.10
FEV1 L−0.330.003−
FEV1 % predicted−0.260.02−0.160.17−0.040.74
6MWD m0.280.01−
Perc15 score HU−0.350.004−0.110.38−0.040.76

Pearson's bivariate test used. Strength of correlation determined by r and significance (sig) by p-value. hsCRP: high sensitivity C-reactive protein, FEV1: forced expiratory volume in 1 s; 6MWD: 6-min walking distance.