Table 1. Demographic and Military Characteristics among Overweight Active Component Army and Air Force Service Members by Altitude, 2006–2012.
| Baseline Covariates | Low Altitude (<0.98km) | HighAltitude (>1.96 km) | p-value* | |
| Person-Years | Total (1000s) | 300.4 | 16.1 | – |
| Baseline Body Mass Index | Mean (kg/m2) | 26.8 | 26.9 | p<0.001 |
| Age | Mean (years) | 28.0 | 27.9 | p<0.001 |
| Time in Service | Mean (years) | 8.0 | 7.8 | p<0.001 |
| Sex | Proportion Male | 92.9 | 93.7 | p<0.001 |
| Service Branch | Proportion Army | 64.5 | 76.6 | p<0.001 |
| Housing Allowance (E1) | Proportion below median | 49.1 | 99.9 | p<0.001 |
| Occupation | Armor/transport | 4.1 | 6.5 | p<0.001 |
| Communication/Intelligence | 26.2 | 26.0 | ||
| Healthcare | 7.6 | 5.9 | ||
| Infantry/artillery/combat | 4.6 | 6.2 | ||
| Other | 27.4 | 32.5 | ||
| Repair/engineer | 28.9 | 22.6 | ||
| Pilot/aircrew | 1.2 | 0.3 | ||
| Race/Ethnicity | Asian | 3.6 | 3.5 | p<0.001 |
| African American | 19.3 | 12.8 | ||
| Hispanic | 12.1 | 12.6 | ||
| American Indian | 0.7 | 1.0 | ||
| Other Race | 1.1 | 0.9 | ||
| Unknown | 2.7 | 2.5 | ||
| White | 60.5 | 66.7 | ||
*P-values based on χ square test of homogeneity for Sex, Service Branch, Housing Allowance, Occupation, and Race/Ethnicity and are based on unequal variance t-test for Age, Time in Service, and BMI. Statistical tests were not weighted for observation time.