Table 2. Population Characteristicsa Among US Service Members, 18–49 Years of Age, During Two Influenza Seasons (2006/2007, 2008/2009).
| Total Study | 2006/2007 | 2008/2009 | Combined Seasons | ||||
| Characteristic | Population | TIV | LAIV | TIV | LAIV | TIV | LAIV |
| Number | 28,929 | 2905 | 10,316 | 3290 | 12,418 | 6195 | 22,734 |
| ILI event | 3936 (13.6) | 383 (13.2) | 1477 (14.3) | 404 (12.3) | 1672 (13.5) | 787 (12.7) | 3149 (13.9) |
| Recent smoking history | 7955 (27.5) | 776 (26.7) | 2814 (27.3) | 941 (28.6) | 3424 (27.6) | 1717 (27.7) | 6238 (27.4) |
| Potential alcohol problem | 2221 (7.7) | 292 (10.1) | 760 (7.4) | 274 (8.3) | 895 (7.2) | 566 (9.1) | 1655 (7.3) |
| Exercise level | |||||||
| Minimal | 3039 (10.5) | 345 (11.9) | 1062 (10.3) | 360 (10.9) | 1272 (10.2) | 705 (11.4) | 2334 (10.3) |
| Moderate | 20,345 (70.3) | 2021 (69.6) | 7243 (70.2) | 2292 (69.7) | 8789 (70.8) | 4313 (69.6) | 16,032 (70.5) |
| High | 1283 (4.4) | 139 (4.8) | 461 (4.5) | 137 (4.2) | 546 (4.4) | 276 (4.5) | 1007 (4.4) |
| Unknown | 4262 (14.7) | 400 (13.8) | 1550 (15.0) | 501 (15.2) | 1811 (14.6) | 901 (14.5) | 3361 (14.8) |
| Age, years | 27 (23–34) | 25 (22–32) | 25 (22–33) | 28 (24–35) | 27 (24–35) | 27 (23–34) | 27 (23–34) |
| Sex | |||||||
| Male | 21,003 (72.6) | 2046 (70.4) | 7537 (73.1) | 2241 (68.1) | 9179 (73.9) | 4287 (69.2) | 16,716 (73.5) |
| Female | 7926 (27.4) | 859 (29.6) | 2779 (26.9) | 1049 (31.9) | 3239 (26.1) | 1908 (30.8) | 6018 (26.5) |
| Race/ethnicity | |||||||
| White/non-Hispanic | 21,090 (72.9) | 2195 (75.6) | 7520 (72.9) | 2345 (71.3) | 9030 (72.7) | 4540 (73.3) | 16,550 (72.8) |
| Black/non-Hispanic | 3620 (12.5) | 286 (9.8) | 1305 (12.7) | 446 (13.6) | 1583 (12.7) | 732 (11.8) | 2888 (12.7) |
| Hispanic | 2077 (7.2) | 206 (7.1) | 714 (6.9) | 261 (7.9) | 896 (7.2) | 467 (7.5) | 1610 (7.1) |
| Other/unknown | 2142 (7.4) | 218 (7.5) | 777 (7.5) | 238 (7.2) | 909 (7.3) | 456 (7.4) | 1686 (7.4) |
| Marital status | |||||||
| Married | 17,857 (61.7) | 1605 (55.2) | 5847 (56.7) | 2233 (67.9) | 8172 (65.8) | 3838 (62.0) | 14,019 (61.7) |
| Other | 11,072 (38.3 | 1300 (44.8) | 4469 (43.3) | 1057 (32.1) | 4246 (34.2) | 2357 (38.1) | 8715 (38.3) |
| Service branch | |||||||
| Air Force | 14,291 (49.4) | 1168 (40.2) | 5469 (53.0) | 1215 (36.9) | 6439 (51.9) | 2383 (38.5) | 11,908 (52.4) |
| Army | 9405 (32.5) | 651 (22.4) | 3639 (35.3) | 923 (28.1) | 4192 (33.8) | 1574 (25.4) | 7831 (34.5) |
| Marine Corps | 2974 (10.3) | 774 (26.6) | 679 (6.6) | 651 (19.8) | 870 (7.0) | 1425 (23.0) | 1549 (6.8) |
| Navy | 2259 (7.8) | 312 (10.7) | 529 (5.1) | 501 (15.2) | 917 (7.4) | 813 (13.1) | 1446 (6.4) |
| Rank | |||||||
| Enlisted | 21,931 (75.8) | 2117 (72.9) | 7914 (76.7) | 2421 (73.6) | 9479 (76.3) | 4538 (73.3) | 17,393 (76.5) |
| Officer | 6998 (24.2) | 788 (27.1) | 2402 (23.3) | 869 (26.4) | 2939 (23.7) | 1657 (26.8) | 5341 (23.5) |
| Occupation | |||||||
| Combat | 5231 (18.1) | 478 (16.5) | 1821 (17.7) | 542 (16.5) | 2390 (19.2) | 1020 (16.5) | 4211 (18.5) |
| Health care | 4280 (14.8) | 592 (20.4) | 1449 (14.0) | 724 (22.0) | 1515 (12.2) | 1316 (21.2) | 2964 (13.0) |
| Other | 19,418 (67.1) | 1835 (63.2) | 7046 (68.3) | 2024 (61.5) | 8513 (68.6) | 3859 (62.3) | 15,559 (68.4) |
| US geographic area | |||||||
| Southwest | 8746 (30.2) | 1101 (37.9) | 2997 (29.1) | 1348 (41.0) | 3300 (26.6) | 2449 (39.5) | 6297 (27.7) |
| Southeast | 8992 (31.1) | 966 (33.3) | 3322 (32.2) | 954 (29.0) | 3750 (30.2) | 1920 (31.0) | 7072 (31.1) |
| Northeast | 6367 (22.0) | 537 (18.5) | 2013 (19.5) | 667 (20.3) | 3150 (25.4) | 1204 (19.4) | 5163 (22.7) |
| Northwest | 4824 (16.7) | 301 (10.4) | 1984 (19.2) | 321 (9.8) | 2218 (17.9) | 622 (10.0) | 4202 (18.5) |
Abbreviations: ILI, influenza-like illness; IQR, interquartile range; LAIV, live, attenuated influenza vaccine; TIV, trivalent inactivated influenza vaccine.
a
Numbers (percentages) for all data except age, which is reported as median (IQR).