Skip to main content
. 2013 May 27;14(1):59. doi: 10.1186/1465-9921-14-59

Table 3.

Discrimination of the various multivariate models in the identification of COPD in subgroups of asymptomatic and symptomatic subjects

 
Model
C-index (95% CI)
    Asymptomatics Symptomatics
1
Baseline model *
0.674 (0.625 -0.722)
0.634 (0.589 - 0.679)
2
+ CT-BWT
0.739 (0.695 - 0.783)
0.764 (0.725 - 0.803)
3
+ CT air trapping
0.737 (0.693 - 0.780)
0.794 (0.759 - 0.829)
4
+ CT emphysema
0.753 (0.707 – 0.800)
0.806 (0.771 - 0.841)
5
+ CT-BWT
0.771 (0.730 – 0.813)
0.821 (0.788 – 0.855)
+ CT air trapping
6
+ CT emphysema
0.782 (0.740 - 0.824)
0.872 (0.844 - 0.899)
+ CT air trapping
7
+ CT emphysema
0.828 (0.790 – 0.866)
0.886 (0.859 - 0.912)
+ CT-BWT
8
+ CT emphysema
0.832 (0.795 – 0.869)
0.905 (0.881 - 0.929)
 
+ CT-BWT
 
 
  + CT air trapping    

* Model including age, body mass index, smoking status and packyears of smoking history; 95% CI = 95th percentile confidence interval; CT-BWT = Quantitatively assessed bronchial wall thickness.