Table 1

Changes in BMI before and during military service according to general characteristics

n%Difference in BMIP value*
MeanSD
Age (years)
 <20693.5−0.094.460.8626
 20–21152177.10.134.730.2808
 ≥2238219.40.164.720.4999
Educational level
 High school28814.60.264.880.3642
 College or above168485.40.114.690.3507
Smoking status
 Non-smoker103952.7−0.084.820.6145
 Ex-smoker1738.80.394.500.2538
 Current smoker76038.50.354.620.0372
Subjective health status
 Good114858.20.054.610.6923
 Normal67734.30.164.790.3857
 Poor1477.50.585.240.1825
Physical activity (MET-min/week)
 <60037619.10.454.810.0695
 600–300066133.5−0.134.750.4801
 >300093547.40.184.660.2285
Strength training
 None43622.10.474.930.0454
 1–2 times per week46023.30.015.100.9642
 ≥3 times per week107654.60.044.450.7656
Sleep duration (hours/day)
 <6593.0−0.154.100.7747
 6–7127364.60.134.720.3299
 ≥864032.50.164.770.4085
Sleep disturbance
 No172487.40.104.690.3840
 Yes24812.60.344.920.2710
Stress
 None53427.10.094.570.6662
 Moderate89345.30.374.490.0148
 Severe54527.6−0.225.190.3285
Depression
 No191597.10.124.720.2831
 Yes572.90.594.780.3598
Total19721000.134.720.2238
  • *Analyses were performed using paired t-test.

  • BMI, body mass index; MET, metabolic equivalent of task.