Table 1 Frequency distribution of baseline study population (in total) and intervention and control group (after residential weight reduction programme), (N = 137)

sex

male

N(%)

65 (47.4)

32 (49.2)

33 (45.8)

0.691***

female

N(%)

72 (52.6)

33 (50.8)

39 (54.2)

age (years)

at recruitment (T-3)

mean (±sd)

13.65 (±1.88)

13.85 (±1.94)

13.47 (±1.82)

0.236*

at randomisation (T0)

mean (±sd)

13.97 (±1.86)

14.17 (±1.93)

13.79 (±1.80)

0.237*

pubertal stage

at recruitment (T-3)

prepubertal

N(%)

16 (11.7)

7 (10.8)

9 (12.5)

0.368**

interpubertal

N(%)

51 (37.2)

22 (33.8)

29 (40.3)

postpubertal

N(%)

70 (51.1)

36 (55.4)

34 (47.2)

at randomisation (T0)

prepubertal

N(%)

10 (7.3)

4 (6.2)

6 (8.3)

0.203**

interpubertal

N(%)

42 (30.7)

17 (26.2)

25 (34.7)

postpubertal

N(%)

85 (62.0)

44 (67.7)

41 (56.9)

German

N(%)

67 (48.9)

30 (46.2)

37 (51.4)

0.639***

Turkish

N(%)

39 (28.5)

18 (27.7)

21 (29.2)

other

N(%)

31 (22.6)

17 (26.2)

14 (19.4)

No certificate

N(%)

6 (4.4)

2 (3.1)

4 (5.6)

0.797***

General education

N(%)

17 (12.4)

6 (9.2)

11 (15.3)

Secondary modern school

N(%)

58 (42.3)

28 (43.1)

30 (41.7)

Grammar school

N(%)

29 (21.2)

14 (21.5)

15 (20.8)

college of higher education, university

N(%)

19 (13.9)

11 (16.9)

8 (11.1)

other

N(%)

8 (5.8)

4 (6.2)

4 (5.6)

lower level

N(%)

23 (16.8)

8 (12.3)

15 (20.8)

0.587***

middle level

N(%)

58 (42.3)

28 (43.1)

30 (41.7)

higher level

N(%)

48 (35.0)

25 (38.5)

23 (31.9)

others

N(%)

8 (5.8)

4 (6.2)

4 (5.6)

BMI-SDS

at recruitment (T-3)

mean (±sd)

2.52 (±.40)

2.51 (±.38)

2.52 (±.42)

0.851*

at randomisation (T0)

mean (±sd)

2.10 (±.47)

2.06 (±.47)

2.14 (±.47)

0.333*