Changes in BMI before and during military service according to the weight group before military service
| Weight group before military service | n | BMI before service, kg/m2 | BMI during service, kg/m2 | Difference in BMI | P value* | |||
| Mean | SD | Mean | SD | Mean | SD | |||
| Underweight | 230 | 17.49 | 0.70 | 23.36 | 2.76 | 5.87 | 2.85 | <0.0001 |
| Normal | 1269 | 21.64 | 1.76 | 22.82 | 2.63 | 1.18 | 3.12 | <0.0001 |
| Overweight | 473 | 28.18 | 2.70 | 22.71 | 2.50 | −5.47 | 3.55 | <0.0001 |
| Total | 1972 | 22.72 | 3.86 | 22.85 | 2.62 | 0.13 | 4.72 | 0.2238 |
*Analyses were performed using paired t-test.
BMI, body mass index.