Background
Methods
MoMo design and sample characteristics
Research methods
Statistical Methods & Modelling
Step 1: Variable selection and preparing the data
Step 2: The longitudinal model against drop-out bias
Step 3: Trimming and standardization
Results
Drop-out rates
Final logistic model
Variable | Value | Odds Ratio | p-value |
---|---|---|---|
Age | 4 | 1.00 | |
5 | 1.07 (0.76–1.50) | .71 | |
6 | 1.50 (1.06–2.11) | .02 | |
7 | 1.14(0.83–1.71) | .42 | |
8 | 1.59 (1.13–2.24) | .01 | |
9 | 0.98 (0.70–1.38) | .93 | |
10 | 0.93 (0.67–1.30) | .69 | |
11 | 0.63 (0.46–0.87) | <.01 | |
12 | 0.69 (0.50–0.95) | .02 | |
13 | 0.56 (0.40–0.77) | <.01 | |
14 | 0.50 (0.37–0.69) | <.01 | |
15 | 0.50 (0.37–0.69) | <.01 | |
16 | 0.61 (0.45–0.83) | <.01 | |
17 | 0.72 (0.53–0.99) | .04 | |
Sex | Female | 1.00 | |
Male | 0.84 (0.75–0.95) | <.01 | |
Socioeconomic status (SES) | Percentile 81–100 (high) | 1.00 | |
Percentile 61–80 | 0.86 (0.70–1.05) | .13 | |
Percentile 41–60 | 0.62 (0.51–0.75) | <.01 | |
Percentile 21–40 | 0.47 (0.39–0.57) | <.01 | |
Percentile 1–20 (low) | 0.22 (0.18–0.27) | <.01 | |
Missing | 0.11 (0.03–0.44) | <.01 | |
Household income | Percentile 81–100 (high) | 1.00 | |
Percentile 61–80 | 0.90 (0.73–1.10) | .28 | |
Percentile 41–60 | 0.72 (0.59–0.88) | <.01 | |
Percentile 21–40 | 0.52 (0.43–0.63) | <.01 | |
Percentile 1–20 (low) | 0.31 (0.26–0.37) | <.01 | |
Missing | 0.49 (0.24–1.01) | .05 | |
Mother’s Education (CASMIN) | High (3b, 3a) | 1.00 | |
Moderate (2a, 2c_gen, 2c_voc) | 0.71 (0.58–0.88) | <.01 | |
Low (1a, 1b, 1c, 2b) | 0.33 (0.26–0.40) | <.01 | |
Missing | 0.34 (0.19–0.61) | <.01 | |
Body Mass Index (BMI) | Underweight | 1.00 | |
Normal weight | 1.02 (0.83–1.27) | .85 | |
Overweight | 0.89 (0.69–1.16) | .39 | |
Obese | 0.39 (0.28–0.55) | <.01 | |
Missing | 0.98 (0.33–2.96) | .97 | |
Who does the child live with? | Natural Parents | 1.00 | |
Mother (with partner) | 0.52 (0.45–0.61) | <.01 | |
Father (with partner) | 0.22 (0.12–0.40) | <.01 | |
Grandparents | 0.71 (0.15–3.46) | .67 | |
Adoptive Parents | 0.30 (0.12–0.74) | <.01 | |
Children’s Home | 0.13 (0.01–1.14) | .07 | |
Missing | 1.03 (0.46–2.29) | .94 | |
Different language at home? | No | 1.00 | |
Yes | 0.39 (0.33–0.46) | <.01 | |
Missing | 0.71 (0.36–1.43) | .34 | |
Type of school | Primary | 1.00 | |
Lower Secondary | 0.28 (0.23–0.35) | <.01 | |
Secondary | 0.59 (0.50–0.70) | <.01 | |
Gymnasium | 0.87 (0.74–1.03) | .11 | |
Comprehensive | 0.43 (0.31–0.58) | <.01 | |
Special | 0.18 (0.10–0.33) | <.01 | |
Missing | 0.68 (0.41–1.12) | .68 | |
Has the child repeated a grade? | No | 1.00 | |
Yes/Missing | 0.32 (0.26–0.39) | <.01 | |
Smoking at home | No | 1.00 | |
Yes | 0.51 (0.45–0.58) | <.01 | |
Missing | 0.26 (0.17–0.41) | <.01 | |
Hyperactivity Disorder (ADHS) | No | 1.00 | |
Unknown | 0.82 (0.50–1.35) | .44 | |
Yes | 0.53 (0.42–0.67) | <.01 | |
Missing | 0.18 (0.13–0.25) | <.01 | |
SDQ (Strength and Difficulties Questionnaire) | Percentile 81–100 (few SD) | 1.00 | |
Percentile 61–80 | 0.77 (0.63–0.93) | <.01 | |
Percentile 41–60 | 0.54 (0.45–0.65) | <.01 | |
Percentile 21–40 | 0.52 (0.44–0.62) | <.01 | |
Percentile 1–20 (many SD) | 0.47 (0.39–0.56) | <.01 | |
Missing | 0.14 (0.08–0.26) | <.01 | |
Daily TV usage | 0 h | 1.00 | |
<1 h | 0.63 (0.43–0.94) | .02 | |
1.5 h | 0.34 (0.23–0.50) | <.01 | |
3–4 h | 0.10 (0.06–0.16) | <.01 | |
5 h+ | 0.02 (0.01–0.10) | <.01 | |
Missing | 0.22 (0.15–0.32) | <.01 | |
Do your parents take you on outings (for example to the cinema)? | Yes, all the time | 1.00 | |
Sometimes | 0.88 (0.75–1.04) | .13 | |
Rarely | 0.54 (0.45–0.64) | <.01 | |
No | 0.47 (0.37–0.61) | <.01 | |
Missing | 0.16 (0.11–0.22) | <.01 | |
Does the child wear a helmet when biking? | Yes | 1.00 | |
No | 0.45 (0.39–0.51) | <.01 | |
No bike | 0.34 (0.26–0.46) | <.01 | |
Missing | 0.21 (0.14–0.31) | <.01 | |
Does the child use toothpaste with fluoride? | Yes | 1.00 | |
No | 1.67 (1.10–2.54) | .02 | |
Missing | 0.45 (0.40–0.51) | <.01 | |
Model information: N: 4528; adjusted R2 = 0.25 (Nagelkerke); −2 log Likelihood: 5239.86; AUC: 73.2% |
Drop-out bias before and after weighting
All participants | |||||
---|---|---|---|---|---|
Variable | Whole sample (baseline weight) | Wave 1 nonresp. (baseline weight) | Wave 1 respondents (baseline weight) | Wave 1 respondents (longitudinal weight) | |
Sex [%] | Male | 51.3% | 53.6% | 46.4% | 51.2% |
Female | 48.7% | 49.5% | 50.5% | 48.8% | |
Age [years] | 11.3 ± 4.1 | 12.0 ± 4.0 | 10.8 ± 4.1 | 11.3 ± 4.1 | |
Socioeconomic status (Winkler index) | Low | 33.7% | 46.1% | 25.1% | 32.9% |
Med | 43.9% | 39.6% | 48.3% | 44.8% | |
High | 20.9% | 14.3% | 26.6% | 21.6% | |
Mig. Background | 16.6% | 23.1% | 11.4% | 15.6% | |
Sport interest (1: very low, 5: very high) | 3.81 ± 1.09 | 3.76 ± 1.13 | 3.86 ± 1.05 | 3.85 ± 1.06 | |
4–5 years | |||||
BMI | 15.7 ± 1.8 | 15.7 ± 2.0 | 15.7 ± 1.6 | 15.8 ± 1.8 | |
Standing long jump [cm] | 88.6 ± 20.2 | 85.7 ± 20.1 | 90.4 ± 20.1 | 89.9 ± 19.6 | |
Days per week with a minimum of 60 min MVPA | 4.9 ± 2.1 | 4.8 ± 2.2 | 4.9 ± 1.9 | 4.9 ± 2.0 | |
Sport club membership | 46.8% | 32.2% | 55.6% | 49.5% | |
Balancing backwards | 12.7 ± 8.5 | 11.3 ± 8.2 | 13.5 ± 8.6 | 13.1 ± 8.5 | |
Jumping side to side | 10.1 ± 3.8 | 9.5 ± 3.7 | 10.4 ± 3.8 | 10.4 ± 3.8 | |
6–10 years | |||||
BMI | 17.0 ± 2.7 | 17.3 ± 3.0 | 16.8 ± 2.5 | 17.0 ± 2.8 | |
Standing long jump [cm] | 124.9 ± 21.2 | 123.8 ± 22.0 | 125.6 ± 20.7 | 125.2 ± 20.7 | |
Days per week with a minimum of 60 min MVPA | 4.4 ± 2.0 | 4.3 ± 2.1 | 4.4 ± 2.0 | 4.4 ± 2.0 | |
Sport club membership | 58.7% | 49.1% | 63.8% | 59.6% | |
Balancing backwards | 27.3 ± 10.1 | 27.1 ± 10.5 | 27.4 ± 9.9 | 27.3 ± 9.8 | |
Jumping side to side | 20.6 ± 6.7 | 20.6 ± 6.7 | 20.5 ± 6.7 | 20.5 ± 6.7 | |
11–13 years | |||||
BMI | 19.7 ± 4.0 | 20.2 ± 4.6 | 19.3 ± 3.2 | 19.6 ± 3.5 | |
Standing long jump [cm] | 153.2 ± 24.0 | 150.6 ± 24.4 | 155.9 ± 23.3 | 154.5 ± 23.3 | |
Days per week with a minimum of 60 min MVPA | 3.6 ± 1.9 | 3.6 ± 2.0 | 3.7 ± 1.8 | 3.7 ± 1.9 | |
Sport club membership | 56.9% | 47.0% | 66.8% | 62.1% | |
Balancing backwards | 33.0 ± 9.4 | 31.4 ± 9.7 | 34.6 ± 8.8 | 34.0 ± 9.1 | |
Jumping side to side | 32.0 ± 6.1 | 31.4 ± 6.7 | 32.5 ± 5.5 | 32.4 ± 5.7 | |
14–17 years | |||||
BMI | 21.9 ± 4.0 | 22.1 ± 4.1 | 21.6 ± 3.8 | 21.9 ± 4.5 | |
Standing long jump [cm] | 173.4 ± 34.8 | 172.2 ± 35.6 | 174.7 ± 33.8 | 173.6 ± 34.4 | |
Days per week with a minimum of 60 min MVPA | 3.3 ± 1.8 | 3.3 ± 1.9 | 3.3 ± 1.8 | 3.3 ± 1.8 | |
Sport club membership | 48.8% | 45.8% | 52.0% | 46.6% | |
Balancing backwards | 34.2 ± 9.2 | 33.8 ± 9.2 | 34.7 ± 9.2 | 34.4 ± 9.3 | |
Jumping side to side | 35.2 ± 6.5 | 34.8 ± 6.6 | 35.7 ± 6.4 | 35.3 ± 6.8 |