Table 1 Baseline characteristics of the total sample (Study population and Population that withdrew), separated by sex

n, No. (%)

42 (100)

21 (50.0)

21 (50.0)

46 (100)

16 (34.8)

30 (65.2)

Age, mean (SD), y

12.8 (3.14)

13.5 (2.59)

12.2 (3.49)

12.7 (2.95)

11.14 (2.11)

13.43 (3.02)

Body mass index, mean (SD), kg/m²

31.96 (5.94)

32.63 (5.97)

31.29 (5.67)

32.08 (6.49)

29.17 (6.88)

33.63 (5.69)

Body mass index z -score, mean (SD)

2.19 (0.34)

2.16 (0.34)

2.22 (0.34)

2.19 (0.32)

2.08 (0.35)

2.25 (0.29)

Waist circumference, mean (SD), cm

103.10 (14.66)

107.35 (15.47)

97.84 (11.60)

102.26 (16.32)

97.09 (16.78)

104.94 (15.41)

Body fat (BIA), mean (SD), %

40.95 (7.24)

39.96 (9.01)

41.95 (4.64)

41.89 (6.86)

37.26 (7.25)

44.87 (4.95)

Fat-free mass (BIA), mean (SD), kg

48.89 (15.00)

53.61 (16.89)

44.16 (10.94)

44.55 (10.67)

38.72 (7.70)

48.55 (7.45)

Tanner Stage, mean (SD)

3 (1.66)

3 (1.62)

3 (1.70)

3 (1.73)

2 (1.39)

4 (1.54)

QoL - Physical Functioning Score, Child report, mean (SD)

74.45 (16.47)

75.18 (13.19)

73.79 (18.93)

75.05 (15.89)

78.26 (10.84)

73.39 (17.73)

QoL - Physical Functioning Score, Parent report, mean (SD)

63.70 (19.43)

60.20 (20.90)

67.21 (17.13)

64.17 (17.86)

70.97 (13.23)

60.21 (18.97)

QoL - Emotional Functioning Score, Child report, mean (SD)

69.04 (14.86)

67.54 (15.00)

70.40 (14.59)

68.66 (17.16)

66.78 (16.28)

69.63 (17.52)

QoL - Emotional Functioning Score, Parent report, mean (SD)

64.02 (18.29)

68.48 (20.65)

70.34 (15.19)

63.19 (16.66)

65.70 (14.28)

61.73 (17.74)

Physical activity score, mean (SD)

2.26 (0.76)

2.40 (0.82)

2.12 (0.67)

2.47 (0.63)

2.69 (0.61)

2.37 (0.61)