Table 3.
Baseline characteristics of the Lung VITAL population.
| Randomized (n=25874) | Respiratory questionnaire follow-up cohort (n=4314) | |
|---|---|---|
|
| ||
| Mean (IQR) | Mean (IQR) | |
| Age at randomization (years) | 67.1 (62.5–71.2) | 67.6 (62.9 – 71.7) |
| Body Mass Index (kg/m2) | 28.2 (24.4–30.9) | 29.9 (25.1–33.3) |
|
| ||
| N (%) | N (%) | |
|
| ||
| Gender | ||
| Female | 13081 (50.6) | 2463 (57.1) |
| Male | 12793 (49.4) | 1851 (42.9) |
| Race/Ethnicity | ||
| African American | 5107 (20.0) | 875 (20.3) |
| Non-Hispanic White | 18047 (69.8) | 2951 (68.4) |
| Hispanic | 1013 (3.9) | 169 (3.9) |
| Asian | 389 (1.5) | 57 (1.3) |
| Other/Mixed | 228 (0.9) | 50 (1.2) |
| Unknown | 1090 (4.2) | 212 (4.9) |
| Smoking Status | ||
| Current | 1728 (6.7) | 555 (12.9) |
| Former | 10371 (40.1) | 2036 (47.2) |
| Never | 13191 (51.0) | 1720 (39.9) |
| unknown | 584 (2.3) | 3 (0.1) |
| Pack-years | ||
| Zeroa | 13191 (51.0) | 1720 (39.9) |
| ≤ 10 | 5705 (22.1) | 904 (21.0) |
| 10–30 | 3903 (15.1) | 851 (19.7) |
| >30 | 2169 (8.4) | 820 (19.0) |
| unknown | 906 (3.5) | 19 (0.4) |
a
“No” to the question: In your lifetime, have you smoked 100 cigarettes or more?