Table 4.
Comparison of characteristics between the emphysema-predominant group and the non-emphysema-predominant group
| Characteristics | Emphysema-predominant group | Non-emphysema-predominant group | P-value |
|---|---|---|---|
| Case | 36 | 34 | |
| Sex, male/female | 33/3 | 24/10 | 0.023a |
| Age, years | 64.33±6.88 | 61.03±9.57 | 0.100b |
| Smoking history, pack-years | 29.32±26.13 | 19.79±19.08 | 0.088b |
| BMI, kg/m2 | 23.69±3.06 | 25.37±2.86 | 0.020b |
| LAA% −950, % | 21.10±10.28 | 3.99±2.94 | <0.001b |
| mMRC score | 2.39±0.77 | 1.68±0.73 | <0.001b |
| IC, L | 2.01±0.68 | 2.18±0.62 | 0.283b |
| FEV1, L | 1.27±0.53 | 1.48±0.63 | 0.131b |
| FEV1%pred, % | 46.92±19.71 | 56.33±17.11 | 0.037 |
| FEV1/FVC, % | 45.78±10.60 | 53.37±10.69 | 0.004b |
| FVC, L | 2.71±0.65 | 2.75±0.91 | 0.807b |
| DLCO, mL/mmHg/min | 6.90±4.10 | 8.40±5.41 | 0.324b |
Notes: Data are presented as mean ± SD.
a
Analysis with chi-squared test.
b
Analysis with independent-sample t-test.
Abbreviations: BMI, body mass index; LAA% −950, percentage of low attenuation areas less than −950 Hu; mMRC, modified Medical Research Council; IC, inspiratory capacity; FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; DLCO, diffusing capacity of the lungs for carbon monoxide; SD, standard deviation; CT, computed tomography; Hu, Hounsfield units.