Table 1. Descriptive Characteristics of Ever Smokers Participating in the Southern Community Cohort Study, 2002-2014a.
| Characteristic | Race | ||
|---|---|---|---|
| White (n = 15 901) | African American (n = 32 463) | Total (N = 48 364) | |
| Incident lung cancer | 478 (3) | 791 (2) | 1269 (3) |
| Female | 9058 (57) | 15 685 (48) | 24 743 (51) |
| Age at enrollment, median (IQR), y | 52.0 (46.0-59.0) | 49.0 (45.0-56.0) | 50.0 (45.0-57.0) |
| Age at lung cancer diagnosis, median (IQR), y | 64.0 (57.0-69.8) | 59.0 (55.0-67.0) | 61.0 (55.0-68.0) |
| Smoking statusb | |||
| Current | 8533 (54) | 20 346 (63) | 28 879 (60) |
| Former | 7368 (46) | 12 117 (37) | 19 485 (40) |
| Pack-years, median (IQR)b | 32.0 (15.0-50.0) | 17.5 (8.4-30.8) | 20.3 (9.5-38.0) |
| Smoking quit timeb,c | 22.0 (11.0-35.0) | 17.0 (8.0-29.0) | 19.0 (9.0-32.0) |
| Cigarettes per day at baseline, median (IQR) | 20.0 (10.0-30.0) | 10.0 (5.0-20.0) | 10.0 (7.0-20.0) |
| Highest educational level | |||
| Below high school | 4287 (27) | 11 202 (35) | 15 489 (32) |
| High school | 5263 (33) | 11 207 (35) | 16 470 (34) |
| Above high school | 6344 (40) | 10 040 (31) | 16 384 (34) |
| Income, US$ | |||
| <15 000 | 8249 (53) | 20 706 (64) | 28 955 (61) |
| 15 000-25 000 | 2980 (19) | 6846 (21) | 9826 (21) |
| >25 000 | 4483 (29) | 4582 (14) | 9065 (19) |
| Body mass index, median (IQR)d | 28.1 (24.2-33.0) | 27.9 (23.9-32.9) | 27.9 (24.0-32.9) |
| Self-reported COPD | 2751 (17) | 2599 (8) | 5350 (11) |
| Family history of lung cancer | 2301 (16) | 2546 (9) | 4847 (11) |
| USPSTF eligible | 4992 (31) | 5654 (17) | 10 646 (22) |
| AALCS eligiblee | 9388 (29) | ||
Abbreviations: AALCS, African American Lung Cancer Screening; COPD, chronic obstructive pulmonary disease; IQR, interquartile range; USPSTF, United States Preventive Services Task Force.
a
Data are presented as number (percentage) of individuals unless otherwise indicated.
b
At the time of diagnosis for persons with incident lung cancer or in 2014 for controls.
c
Among former smokers only (n = 16 501).
d
Calculated as weight in kilograms divided by height in meters squared.
e
AALCS eligibility criteria: age 55 to 80 years and 20 pack-years or more of smoking.