Table 1 Selected descriptive characteristics of cases (overall and according to source of case ascertainment) and controls in the study of brain cancer among active component military personnel
Characteristic | Controls N = 457 (%) | Cases N = 457 (%) | ACTUR N = 162 (%) | DMSS N = 295 (%) |
|---|---|---|---|---|
Sexa | ||||
Male | 406 (88.8) | 406 (88.8) | 142 (87.7) | 264 (89.5) |
Female | 51 (11.1) | 51 (11.1) | 20 (12.4) | 31 (10.5) |
Racea | ||||
White | 371 (81.2) | 371 (81.2) | 130 (80.3) | 241 (81.7) |
Black | 52 (11.4) | 52 (11.4) | 23 (14.2) | 29 (9.8) |
Other | 16 (3.5) | 16 (3.5) | 2 (1.2) | 14 (4.8) |
Unknown | 18 (3.9) | 18 (3.9) | 7 (4.3) | 11 (3.7) |
Reference age (years)a,b | ||||
18–20 | 37 (8.1) | 38 (8.3) | 16 (9.9) | 22 (7.5) |
21–24 | 94 (20.6) | 95 (20.8) | 34 (21.0) | 61 (20.7) |
25–29 | 99 (21.7) | 99 (21.7) | 36 (22.2) | 63 (21.4) |
30–34 | 69 (15.1) | 69 (15.1) | 24 (14.8) | 45 (15.3) |
35–39 | 82 (17.9) | 80 (17.5) | 31 (19.1) | 49 (16.6) |
40–61 | 76 (16.6) | 76 (16.6) | 21 (13.0) | 55 (18.6) |
Year of birtha | ||||
1945–1963 | 81 (17.7) | 81 (17.7) | 45 (27.8) | 36 (12.2) |
1964–1969 | 79 (17.3) | 78 (17.1) | 43 (26.5) | 35 (11.9) |
1970–1974 | 105 (23.0) | 99 (21.7) | 36 (22.2) | 63 (21.4) |
1975–1983 | 106 (23.2) | 111 (24.3) | 29 (17.9) | 82 (27.8) |
1984–1991 | 86 (18.8) | 88 (19.3) | 9 (5.6) | 79 (26.8) |
Military serviceb,c | ||||
Army | 163 (35.7) | 164 (35.9) | 67 (41.4) | 97 (32.9) |
Navy | 156 (34.1) | 118 (25.8) | 44 (27.2) | 74 (25.1) |
Air force | 63 (13.8) | 104 (22.8) | 31 (19.1) | 73 (24.8) |
Marines | 74 (16.2) | 61 (13.4) | 19 (11.7) | 42 (14.2) |
Coast guard | 1 (0.2) | 10 (2.2) | 1 (0.6) | 9 (3.1) |
Number of pre-diagnostic serum samplesa | ||||
One | 71 (15.5) | 70 (15.3) | 41 (25.3) | 29 (9.8) |
Two | 80 (17.5) | 81 (17.7) | 36 (22.2) | 45 (15.3) |
Three | 306 (67.0) | 306 (67.0) | 85 (52.5) | 221 (74.9) |
Time between serum collection and reference year (years)c,d | ||||
1.0–1.8 | 287 (25.0) | 286 (24.9) | 56 (15.2) | 230 (29.4) |
1.9–3.5 | 280 (24.4) | 282 (24.5) | 110 (29.9) | 172 (22.0) |
3.6–7.1 | 282 (24.5) | 286 (24.9) | 97 (26.4) | 189 (24.2) |
7.2–22.1 | 300 (26.1) | 296 (25.7) | 105 (28.5) | 191 (24.4) |
