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Table 1 Predictors and their OR for wave 1 participation in the step 2 final logistic model

From: Longitudinal drop-out and weighting against its bias

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%