Table 1.
Comparisons of baseline characteristics suggested the credibility of %LAA-950-dependent grouping method
| Characteristics | Severe emphysema group (n=11) | Mild emphysema group (n=12) | P-value |
|---|---|---|---|
| Age (years) | 61.6±5.9 | 63.1±10.4 | .0.05 |
| Male/female | 8/3 | 6/6 | .0.05 |
| BMI (kg/m2) | 23.0±3.3 | 27.9±5.3 | 0.0102 |
| Smoking history (pack-years) | 66.5±21.2 | 58.6±29.2 | 0.0013 |
| %LAA-950 | 52.7±2.0 | 7.3±5.3 | <0.0001 |
| FEV1 (%predicted) | 23.0±8.4 | 32.7±13.3 | 0.051 |
| FEV1/FVC (%) | 25.5±4.8 | 42.3±14.2 | 0.0012 |
Abbreviations: BMI, body mass index; %LAA-950, percents of low attenuation areas <−950 Hounsfield unit on inspiratory CT.