Table 1.
Demographics of Cohorts
| Variable | LDCT Scan Use Cohort | Lung Cancer Cohort |
|---|---|---|
| All | 414,358 (100) | 48,891 (100) |
| Sex | ||
| Male | 187,357 (45.2) | 24,653 (50.4) |
| Female | 227,027 (54.8) | 24,238 (49.6) |
| Race or ethnicity | ||
| Non-Hispanic White | 327,118 (78.9) | 42,129 (86.2) |
| Non-Hispanic Black | 33,247 (8.0) | 3,878 (7.9) |
| Hispanic | 11,341 (2.7) | 356 (0.7) |
| Asian | 16,317 (3.9) | 987 (2.0) |
| Other or unknown | 26,361 (6.4) | 1,541 (3.2) |
| COPDa | 83,727 (20.3) | 31,132 (64.1) |
| Tobacco use disordera | 48,062 (12.4) | 18,994 (28.9) |
| Average follow-up, yb | 3.6 | 1.4 |
Data are presented as No. (%). LDCT = low-dose CT.
a
Unknowns excluded from percentage calculations. Condition at any year for LDCT scan use cohort and in year of diagnosis for lung cancer cohort.
b
Years of coverage for LDCT scan use cohort and years of mortality follow-up for lung cancer cohort.