Table 2.
Baseline characteristics by BMI status (normal weight, underweight and overweight)a
| P b | All | Normal weight | Underweight | Overweight | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| n | Control Mean (SD) | Intervention Mean (SD) | n | Control Mean (SD) | Intervention Mean (SD) | n | Control Mean (SD) | Intervention Mean (SD) | n | ||
| Age | 0.04 | 1292 | 12.91 (0.82) | 12.80 (0.75) | 1014 | 13.05 (0.84) | 12.89 (0.84) | 79 | 12.77 (0.78) | 12.75 (0.79) | 278 |
| Body mass index (kg/m2) | <0.001 | 1292 | 18.79 (1.67) | 18.79 (1.65) | 1014 | 15.51 (0.83) | 15.20 (0.73) | 79 | 24.24 (2.04) | 24.90 (2.81) | 278 |
| Body mass index Z-score | <0.001 | 1292 | 0.06 (0.64) | 0.07 (0.68) | 1014 | −1.66 (0.40) | −1.80 (0.43) | 79 | 1.73 (0.43) | 1.84 (0.52) | 278 |
| Low socio economic status (%) | 0.03 | 1240 | 34.56 | 32.78 | 971 | 29.41 | 41.46 | 75 | 26.36 | 25.00 | 269 |
| Female proportion (%) | 0.78 | 1292 | 58.30 | 66.73 | 1014 | 61.76 | 60.00 | 66 | 58.52 | 68.53 | 278 |
| Fitness (EUROFIT) | |||||||||||
| Speed-agility | |||||||||||
| Speed shuttle run (s) | <0.001 | 1257 | 24.37 (2.14) | 24.44 (2.28) | 987 | 24.52 (2.82) | 23.86 (2.80) | 76 | 25.16 (2.08) | 25.63 (2.37) | 270 |
| Muscle strength and endurance | |||||||||||
| Vertical jump (cm) | <0.001 | 1259 | 26.51 (5.41) | 25.86 (5.70) | 991 | 25.23 (5.54) | 26.19 (4.88) | 76 | 24.21 (4.96) | 23.66 (5.34) | 268 |
| Accelerometer data | |||||||||||
| % who meet the PA recommendation (60 min MVPA/day) | 0.29 | 225 | 91.02 | 96.70 | 169 | 100 | 85.71 | 11 | 91.30 | 90.90 | 45 |
aThe overweight group includes overweight and obese adolescents according to the IOTF criteria [30]
b P-value for differences between overweight, normal-weight and underweight groups
The analysis was adjusted for the study design