Table 1.
—Characteristics of Subjects in the Derivation Cohort
| Characteristic | NHW (n = 386) | AA (n = 83) |
| Age, y | 61 (54-67) | 51 (48-55) |
| Female sex, No. (%) | 216 (56) | 35 (42) |
| Height, cm | 168.7 (161.5-175.3) | 170.4 (162.9-177.8) |
| Weight, kg | 80.0 (67.0-91.0) | 83.0 (71.0-90.5) |
| BMI, kg/m2 | 27.8 (24.1-31.5) | 27.0 (24.7-30.7) |
| Current smoker, No. (%) | 92 (24) | 73 (88) |
| Pack-y | 29 (11-44) | 33 (21-42) |
| FEV1 % predicted | 97 (90-106) | 101 (92-114) |
| %LAA-950 | 2.5 (0.9-4.9) | 1.7 (0.6-2.9) |
| CT scan-measured TLC, % predicted | 99 (94-105) | 96 (92-102) |
| %LAA-856 on expiratory CT scana | 10.7 (5.8-15.6) | 10.0 (3.9-17.6) |
Data presented as medians and interquartile ranges unless otherwise specified. AA = African American; NHW = non-Hispanic white; %LAA-856 = percentage of low attenuation area (< −856 Hounsfield units) on expiratory CT scan; %LAA-950 = percentage of low attenuation area (< −950 Hounsfield units) on inspiratory CT scan; TLC = total lung capacity.
a
Missing data for 23 NHW, 5 AA.