Table 1.
Demographic and Deployment Characteristics of US Marine Corps Health Assessment Project Participants
| Study population N = 706 |
||
|---|---|---|
| n | %a | |
| Baseline characteristics | ||
| Age, years | ||
| 17-20 | 553 | 78.3 |
| 21-31 | 153 | 21.7 |
| Education | ||
| High school or less | 528 | 74.8 |
| More than high school | 178 | 25.2 |
| Race/ethnicity | ||
| White non-Hispanic | 474 | 67.1 |
| Hispanic | 166 | 23.5 |
| Other | 66 | 9.4 |
| Adverse childhood experiences | ||
| 0 | 353 | 50.0 |
| 1 | 244 | 34.6 |
| 2-7 | 109 | 15.4 |
| Prior violence exposures | ||
| 0 | 407 | 57.6 |
| 1 | 179 | 25.4 |
| 2-7 | 120 | 17.0 |
| Potential problem drinking | ||
| No | 644 | 91.2 |
| Yes | 62 | 8.8 |
| Number of close friends/relatives | ||
| 0-2 | 203 | 28.7 |
| 3-4 | 261 | 37.0 |
| 5 or more | 242 | 34.3 |
| Follow-up characteristics | ||
| Number of close friends/relatives | ||
| 0-2 | 202 | 28.6 |
| 3-4 | 222 | 31.4 |
| 5 or more | 282 | 39.9 |
| Enlisted pay grade | ||
| Junior enlisted (E1-E3) | 334 | 47.3 |
| Noncommissioned officer (E4-E5) | 372 | 52.7 |
| Number of deployments | ||
| 1 | 433 | 61.3 |
| 2 | 273 | 38.7 |
| Length of last deployment | ||
| 1-120 days | 211 | 29.9 |
| 121-240 days | 441 | 62.5 |
| >240 days | 54 | 7.7 |
| Cumulative length of deploymentsb | ||
| 31-120 days | 136 | 19.3 |
| 121-240 days | 308 | 43.6 |
| 241-360 days | 172 | 24.4 |
| >360 days | 90 | 12.8 |
| Gap timec | ||
| 0 days | 257 | 36.4 |
| 1-180 days | 222 | 31.4 |
| >180 days | 227 | 32.2 |
| Number of Combat Exposures Types | ||
| 0-1 | 267 | 37.8 |
| 2-3 | 257 | 36.4 |
| 4-6 | 182 | 25.9 |
aPercents may not add to 100 due to rounding.
bCumulative number of days deployed for all deployments that occurred between baseline and follow-up surveys.
cNumber of days from last deployment to follow-up survey completion. If survey was completed while on deployment, gap time equals zero.