Skip to main content

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%