Table 1. Baseline characteristics by BMI category of 731,014 men and women accessing into the US Army, 2001–2011.
| Category of BMI (kg/m2) | ||||||
|---|---|---|---|---|---|---|
| Underweight | Normal weight | Overweight | Obese | |||
| <18.5 | 18.5 to <25 | 25 to <30 | ≥30 | Total | ||
| N | 17,478 | 390,738 | 249,823 | 72,975 | 731,014 | |
| Female, % | 27.46 | 21.06 | 14.32 | 2.26 | 17.04 | |
| Age, years a | 20.79 (3.37) | 21.22 (3.69) | 22.22 (4.19) | 22.34 (4.03) | 21.66 (3.93) | |
| BMI, kg/m2a | 17.91 (0.55) | 22.15 (1.72) | 27.14 (1.38) | 32.07 (1.77) | 24.74 (3.82) | |
| Age category, % | ||||||
| < 20 years | 56.21 | 51.30 | 39.30 | 35.17 | 45.71 | |
| 20 to < 30 years | 40.70 | 44.70 | 54.21 | 58.64 | 49.25 | |
| 30 to < 40 years | 3.04 | 3.88 | 6.30 | 6.06 | 4.91 | |
| ≥ 40 years | 0.05 | 0.12 | 0.18 | 0.13 | 0.14 | |
| Meets STW, % | ||||||
| Under STW | 41.62 | 0.44 | 0.00 | 0.00 | 1.23 | |
| Meets STW | 58.26 | 96.56 | 50.42 | 0.00 | 70.24 | |
| Above STW | 0.12 | 3.00 | 49.58 | 100.00 | 28.53 | |
| Race/Ethnicity, % | ||||||
| White | 67.02 | 66.82 | 66.78 | 63.12 | 66.44 | |
| Black | 17.95 | 17.59 | 14.66 | 17.55 | 16.60 | |
| Hispanic | 9.47 | 10.27 | 13.15 | 14.06 | 11.61 | |
| Asian/Pacific Islander | 4.39 | 4.07 | 4.07 | 4.1 | 4.08 | |
| Indian/Alaskan | 0.83 | 1.01 | 1.1 | 0.97 | 1.03 | |
| Other/Unknown | 0.33 | 0.24 | 0.23 | 0.18 | 0.24 | |
| Education, % | ||||||
| <High school | 3.56 | 3.6 | 4 | 3.56 | 3.73 | |
| High school | 63.58 | 63.96 | 62.88 | 64.65 | 63.65 | |
| College/Some college | 19.96 | 19.55 | 20.78 | 19.34 | 19.96 | |
| Advanced degree | 0.10 | 0.28 | 0.44 | 0.27 | 0.33 | |
| Other/Unknown | 12.81 | 12.61 | 11.91 | 12.18 | 12.33 | |
| Marital status, % | ||||||
| Never married | 84.7 | 84.06 | 77.82 | 76.15 | 81.15 | |
| Married | 14.23 | 14.39 | 20.08 | 21.98 | 17.09 | |
| Divorced/Separated/ Widowed | 1.03 | 1.48 | 2.02 | 1.8 | 1.68 | |
| Other/Unknown | 0.04 | 0.07 | 0.08 | 0.07 | 0.07 | |
| Occupation, % | ||||||
| Infantry/Gun Crews | 43.31 | 48.16 | 51.11 | 52.19 | 49.46 | |
| Electr. Equip. Repair | 5.42 | 4.93 | 4.67 | 4.92 | 4.85 | |
| Communications/Intel. | 8.63 | 8.29 | 7.99 | 8.45 | 8.21 | |
| Enlisted Health Care | 5.13 | 5.35 | 5.28 | 4.69 | 5.26 | |
| Technic/Allied Special | 2.44 | 2.39 | 2.27 | 2.12 | 2.32 | |
| Support/Admin. | 10.84 | 8.25 | 6.33 | 4.43 | 7.27 | |
| Elect./Mechan. Equip Rep | 10.20 | 9.03 | 8.55 | 8.99 | 8.89 | |
| Craftsworkers | 1.54 | 1.51 | 1.45 | 1.41 | 1.48 | |
| Service/Supply | 10.65 | 9.63 | 9.35 | 10.40 | 9.64 | |
| Non-occupational Enlisted | 1.85 | 2.45 | 3.00 | 2.41 | 2.62 | |
| Other | 0.00 | 0.01 | 0.01 | 0.00 | 0.01 | |
| Number of deployments a,b | 1.61 (0.94) | 1.64 (1.01) | 1.60 (0.98) | 1.52 (0.86) | 1.61 (0.99) | |
Abbreviations: BMI, body mass index; STW, standard table weight.
aMean (SD).
bIn the follow-up period.