Demographic characteristics of study participants
| Characteristic | Total (n=181) | Controls (n=127) | BeS* (n=35) | CBD (n=19) |
| Gender, n (%) | ||||
| Male | 164 (91%) | 116 (91%) | 31 (89%) | 17 (89%) |
| Female | 17 (9%) | 11 (9%) | 4 (11%) | 2 (11%) |
| Race, n (%) | ||||
| White | 174 (96%) | 124 (98%) | 34 (97%) | 16 (84%) |
| African-American | 7 (4%) | 3 (2%) | 1 (3%) | 3 (16%)† |
| Smoking status, n (%) | ||||
| Never | 78 (43%) | 57 (45%) | 13 (37%) | 8 (42%) |
| Former | 91 (50%) | 61 (48%) | 19 (54%) | 11 (58%) |
| Current | 12 (7%) | 9 (7%) | 3 (9%) | 0 (0%) |
| Work status, n (%) | ||||
| Current worker | 85 (47%) | 58 (46%) | 15 (43%) | 12 (63%) |
| Former worker | 96 (53%) | 69 (54%) | 20 (57%) | 7 (37%) |
| Median age (range) | 62 (30–87) | 63 (30–87) | 62 (41–87) | 58 (48–81) |
| Median year of hire (range) | 1970 (1947–2001) | 1969 (1947–2001) | 1972 (1950–1998) | 1970 (1958–1985) |
| Median years at Y-12 (range) | 25 (<1–47) | 24 (<1–47) | 19 (3–40)‡ | 22 (2–31) |
| Median number of job titles (range) | 2 (1–7) | 2 (1–5) | 3 (1–5) | 2.5 (1–5) |
| Median number of beryllium exposure tasks (range) | 2 (0–8) | 1 (0–4)‡ | 2 (1–5)§ | 2 (0–5) |