Table 2.
Clinical and demographic information of the study participants when separated by CT quantification.
| CT Quantification | LAA < 7% No emphysema | LAA ≥ 7% Emphysema |
|---|---|---|
| Number | 102 | 122 |
| Age, mean (±s.d.) | 53 ± 8 | 62 ± 10 |
| Height, cm (±s.d.) | 170 ± 10 | 174 ± 9 |
| Weight, kg (±s.d.) | 85 ± 20 | 86 ± 19 |
| Male, no. (%) | 45 (44%) | 100 (82%) |
| Ethnicity, no. (%) | ||
| Black | 59 (58%) | 35 (29%) |
| Hispanic | 4 (4%) | 4 (3%) |
| White | 37 (36%) | 82 (67%) |
| Other | 2 (2%) | 1 (1%) |
| Smoking status, no. (%) | ||
| Current | 84 (82%) | 49 (40%) |
| Former | 18 (18%) | 73 (60%) |
| Pack-years, mean (±s.d.) | 41 ± 36 | 56 ± 36 |
| Quitting years, mean (±s.d.) | 13 ± 13 | 12 ± 10 |
| Lung function | ||
| %FEV1 (±s.d.) | 87 ± 18 | 62 ± 26 |
| FEV1/FVC (±s.d.) | 74 ± 10 | 55 ± 16 |
| %DLCO (±s.d.) | 74 ± 16 | 57 ± 22 |
CT: computerized tomography; LAA: low attenuation area (% emphysema) by CT quantification; s.d.: standard deviation; cm: centimeters; kg: kilograms; no.: number; %FEV1: forced expiratory volume in 1 second, percent of predicted (post-bronchodilator); %DLCO: diffusing capacity for carbon monoxide, percent of predicted; pack-years: years smoked x packs per day; quitting years: number of years since last reported smoking activity.