Table 1.
Characteristics of Millennium Cohort participants and Family Survey response – included in final response propensity model
| Characteristic | Prevalence of characteristicsa | Percent responding to Family Survey | P-value | |
|---|---|---|---|---|
| Unweighted n | Prevalence | |||
| Total | 28,603 | 100.00 | 34.3 | |
| Demographic, service, and administrative characteristics | ||||
| Gender | ||||
| Male | 21,984 | 86.0 | 37.1 | <0.0001 |
| Female | 6619 | 14.0 | 16.6 | |
| Age | ||||
| 17–24 years | 12,378 | 48.3 | 31.0 | <0.0001 |
| 25–29 years | 10,797 | 35.5 | 37.5 | |
| 30+ years | 5428 | 16.2 | 37.1 | |
| Race/ethnicity | ||||
| White, non-Hispanic | 21,294 | 69.6 | 37.6 | <0.0001 |
| Black, non-Hispanic | 2470 | 12.1 | 22.1 | |
| Hispanic | 2602 | 10.8 | 29.1 | |
| Other | 2237 | 7.5 | 30.2 | |
| Education | ||||
| < High school completion/diploma | 51 | 0.2 | 19.9 | <0.0001 |
| High school degree/GED/or equivalent | 5477 | 24.2 | 29.8 | |
| Some college (including 2 years degree) | 15,469 | 57.4 | 33.4 | |
| Bachelor’s degree | 5414 | 14.1 | 41.9 | |
| Advanced degree | 2192 | 4.1 | 46.7 | |
| Income | ||||
| < $50,000 | 15,912 | 62.5 | 33.5 | <0.0001 |
| $50,000–$74,999 | 5799 | 18.4 | 37.2 | |
| $75,000+ | 4817 | 11.1 | 41.1 | |
| Missing | 2075 | 7.9 | 24.2 | |
| Number of dependent children | ||||
| None | 12,664 | 44.6 | 32.2 | <0.0001 |
| One | 7865 | 27.5 | 35.2 | |
| Two | 5205 | 18.0 | 36.6 | |
| Three or more | 2869 | 9.8 | 36.8 | |
| Component | ||||
| Active duty | 22,365 | 78.9 | 34.1 | 0.1408 |
| Reserve/National Guard | 6238 | 21.1 | 35.1 | |
| Service branch | ||||
| Army | 12,949 | 50.3 | 34.7 | 0.0001 |
| Navy/Coast Guard | 4698 | 17.1 | 35.7 | |
| Marine Corps | 2649 | 15.3 | 34.4 | |
| Air Force | 8307 | 17.4 | 31.6 | |
| Pay grade | ||||
| Enlisted | 23,505 | 91.0 | 32.8 | <0.0001 |
| Warrant/commissioned officer | 5098 | 9.0 | 48.7 | |
| Deployment/combat | ||||
| Not deployed | 6276 | 19.5 | 31.3 | <0.0001 |
| Deployed, no combat | 3357 | 10.7 | 33.7 | |
| Deployed, in combat | 17,977 | 65.9 | 36.0 | |
| Deployed, combat unknown | 993 | 4.0 | 21.4 | |
| Panel 4 survey completion | ||||
| Complete | 27,045 | 93.9 | 35.1 | <0.0001 |
| Partial | 1558 | 6.1 | 20.8 | |
| Panel 4 respondent referred spouse | ||||
| Yes | 8319 | 28.9 | 64.5 | <0.0001 |
| No | 20,284 | 71.1 | 22.0 | |
| Health behaviours | ||||
| Average hours of sleep/day | ||||
| <6 h | 6848 | 27.76 | 32.2 | <0.0001 |
| 6 h | 8192 | 28.95 | 34.1 | |
| 7 h | 6939 | 21.53 | 39.2 | |
| 8 h | 4707 | 15.01 | 34.1 | |
| >8 h | 1298 | 4.43 | 32.4 | |
| Missing | 619 | 2.33 | 19.7 | |
| Description of usual activities | ||||
| Sit during day and do not walk much | 6581 | 20.5 | 35.2 | <0.0001 |
| Stand/ walk a lot, little lifting | 11,052 | 37.5 | 32.9 | |
| Light loads, or climb often | 7893 | 29.4 | 35.5 | |
| Heavy work | 2499 | 10.3 | 36.8 | |
| Missing | 578 | 2.2 | 20.5 | |
| Physical health indices | ||||
| Body mass index | ||||
| <25.0 | 10,612 | 34.3 | 33.7 | <0.0001 |
| 25.0–29.9 | 13,710 | 49.5 | 35.3 | |
| 30.0+ | 3893 | 14.9 | 33.9 | |
| Missing | 388 | 1.3 | 14.7 | |
| Days unable to work due to illness/injury | ||||
| None | 16,622 | 58.2 | 34.4 | <0.0001 |
| 1–5 days | 6456 | 21.1 | 34.6 | |
| 6–15 days | 2196 | 7.9 | 32.9 | |
| 16+ days | 2657 | 10.4 | 35.7 | |
| Missing | 672 | 2.4 | 25.0 | |
| Mental health indices | ||||
| VR-36 mental component score | ||||
| Lowest 15% | 3611 | 14.1 | 31.6 | <0.0001 |
| Middle 70% | 19,279 | 66.5 | 35.4 | |
| Highest 15% | 4335 | 14.0 | 35.9 | |
| Missing | 1378 | 5.3 | 22.6 | |
| Having no one to turn to when you have a problem | ||||
| Not bothered | 22,717 | 77.4 | 35.6 | <0.0001 |
| Bothered a little | 3699 | 14.0 | 31.2 | |
| Bothered a lot | 1674 | 6.8 | 29.8 | |
| Missing | 513 | 1.8 | 18.5 | |
| Financial problems or worries | ||||
| Not bothered | 16,001 | 51.7 | 35.0 | <0.0001 |
| Bothered a little | 8846 | 33.1 | 35.4 | |
| Bothered a lot | 3314 | 13.6 | 30.7 | |
| Missing | 442 | 1.6 | 18.2 | |
| Overall attitude about military service | ||||
| Negative/somewhat negative | 4773 | 17.3 | 32.8 | <0.0001 |
| Neither negative or positive | 3713 | 13.7 | 30.7 | |
| Positive/somewhat positive | 18,264 | 61.8 | 36.7 | |
| Missing | 1853 | 7.12 | 23.4 | |
| Trauma | ||||
| Stressful events since 2008 | ||||
| None | 12,035 | 40.9 | 34.8 | <0.0001 |
| 1 or 2 | 11,434 | 40.0 | 36.2 | |
| 3 or more | 3626 | 13.3 | 32.6 | |
| Missing | 1508 | 5.9 | 21.1 | |
aUnless specified as "unweighted", all table values are weighted with the Normalized Adjusted Weight 1 [Design weight with raking adjustment for non-response to P4W1]