Table 3.
Average changes of BMI-SDS by age and sex.
| Average changes during… | 10-11 years | |||||
|---|---|---|---|---|---|---|
| Girls (N = 77) | Boys (N = 65) | |||||
| Mean difference of BMI-SDS: mean (SD) |
Test statistics1 | Successful weight reduction2 in 10-11-year-old girls (in %) | Mean difference of BMI-SDS: mean (SD) |
Test statistics1 | Successful weight reduction2 in 10-11-year-old boys (in %) | |
| 1-year program (Baseline to end of program) |
−0.27 (0.41) | Mdn = −0.26 z = −5.06, P < 0.001 |
54.4% | −0.28 (0.32) | Mdn = −0.26 z = −5.59, P < 0.001 |
53.8% |
| Baseline to 36-month follow-up (3YFU) | −0.08 (0.49) | Mdn = 0 z = −1.30, n.s. |
27.8% | −0.11 (0.33) | Mdn = 0 z = −2.33, P < 0.050 |
23.1% |
| Baseline to 60-month follow-up (5YFU) | −0.06 (0.52) | Mdn = 0 z = −0.68, n.s. |
17.7% | −0.03 (0.34) | Mdn = 0 z = −0.40, n.s. |
12.3% |
|
| ||||||
| Average changes during… | 12-13 years | |||||
| Girls (N = 160) | Boys (N = 135) | |||||
| Mean difference of BMI-SDS: mean (SD) |
Test statistics1 | Successful weight reduction2 in 12-13-year-old girls (in %) | Mean difference of BMI-SDS: mean (SD) |
Test statistics1 | Successful weight reduction2 in 12-13-year-old boys (in %) | |
|
| ||||||
| 1-year program (Baseline to end of program) |
−0.41 (0.44) | Mdn = −0.33 z = −9.19, P < 0.001 |
57.2% | −0.35 (0.39) | Mdn = −0.29 z = −8.41, P < 0.001 |
59.2% |
| Baseline to 36-month follow-up (3YFU) | −0.31 (0.51) | Mdn = −0.04 z = −6.98, P < 0.001 |
41.0% | −−0.16 (0.48) | Mdn = 0 z = −3.16, P < 0.010 |
31.9% |
| Baseline to 60-month follow-up (5YFU) | −0.25 (0.59) | Mdn = 0 z = −5.13, P < 0.001 |
25.5% | −0.09 (0.51) | Mdn = 0 z = −1.58, n.s. |
17.7% |
|
| ||||||
| Average changes during… | 14-15 years | |||||
| Girls (N = 95) | Boys (N = 66) | |||||
| Mean difference of BMI-SDS: mean (SD) |
Test statistics1 | Successful weight reduction2 in 14-15-year-old girls (in %) | Mean difference of BMI-SDS: mean (SD) |
Test statistics1 | Successful weight reduction2 in 14-15-year-old boys (in %) | |
|
| ||||||
| 1-year program (Baseline to end of program) |
−0.36 (0.42) | Mdn = −0.27 z = −7.01, P < 0.001 |
55.2% | −0.38 (0.42) | Mdn = −0.29 z = −6.00, P < 0.001 |
60.6% |
| Baseline to 36-month follow-up (3YFU) | −0.28 (0.53) | Mdn = 0 z = −4.70, P < 0.001 |
39.0% | −0.13 (0.47) | Mdn = 0 z = −2.06, P < 0.050 |
30.3% |
| Baseline to 60-month follow-up (5YFU) | −0.22 (0.41) | Mdn = 0 z = −4.70, P < 0.001 |
27.5% | −0.17 (0.52) | Mdn = 0 z = −52.72, P < 0.010 |
19.7% |
1Test statistics calculated by Wilcoxon-test.
2“Successful weight reduction” means a BMI-SDS reduction > 0.2 BMI-SDS.
SD: standard deviation.
Mdn: median.
3YFU: 3-year follow-up (36 month/3 years after baseline).
5YFU: 5-year follow-up (60 month/5 years after baseline).