Table 3 Strengths and Difficulties Questionnaire (SDQ) according to weekly hours of physical activity. SDQ (mean scores) at age 18–19 years according to hours of physical activity per week at age 15–16 years, in boys and girls – unadjusted (crude) and adjusted for confounders and mental health at baseline.

5.91

0.001

3.28

0.020

6.14

<0.001

0.08

0.971

80

2.00

(1.60–2.40)

73

1.80

(1.46–2.14)

141

4.05

(3.64–4.46)

131

3.54

(3.19–3.89)

424

1.96

(1.78–2.13)

410

1.86

(1.72–2.01)

777

3.59

(3.42–3.76)

750

3.48

(3.34–3.62)

263

1.51

(1.32–1.69)

254

1.56

(1.38–1.75)

233

3.09

(2.80–3.37)

227

3.46

(3.20–3.73)

307

1.55

(1.38–1.73)

299

1.56

(1.40–1.73)

156

3.18

(2.80–3.56)

151

3.54

(3.22–3.87)

2.90

0.087

1.28

0.280

1.69

0.168

1.09

0.353

81

1.62

(1.35–1.89)

74

1.57

(1.30–1.85)

141

1.89

(1.69–2.08)

131

1.69

(1.50–1.88)

424

1.71

(1.57–1.84)

412

1.71

(1.60–1.83)

777

1.64

(1.56–1.73)

753

1.63

(1.55–1.71)

263

1.51

(1.34–1.67)

253

1.58

(1.43–1.73)

233

1.65

(1.51–1.79)

227

1.70

(1.56–1.84)

307

1.79

(1.64–1.95)

300

1.75

(1.62–1.89

156

1.72

(1.53–1.92)

151

1.80

(1.63–1.97)

1.14

0.331

0.92

0.431

1.14

0.331

0.47

0.700

81

3.48

(3.00–3.96)

74

3.31

(2.89–3.73)

141

4.08

(3.75–4.41)

131

3.95

(3.63–4.27)

424

3.23

(3.04–3.42)

410

3.27

(3.09–3.45)

778

3.78

(3.63–3.92)

751

3.80

(3.67–3.93)

263

3.32

(3.08–3.56)

254

3.34

(3.11–3.57)

233

3.89

3.61–4.17)

227

3.90

(3.66–4.14)

307

3.50

(3.25–3.74)

299

3.50

(3.29–3.71)

156

3.99

(3.65–4.33)

151

3.93

(3.63–4.22)

13.3

<0.001

2.57

0.053

4.41

0.004

2.10

0.098

81

2.20

(1.83–2.56)

74

1.79

(1.48–2.10)

141

1.90

(1.62–2.18)

131

1.74

(1.50–1.98)

424

1.69

(1.54–1.84)

409

1.52

(1.39–1.65)

777

1.49

(1.38–1.60)

750

1.43

(1.34–1.53)

263

1.21

(1.04–1.38)

254

1.40

(1.23–1.56)

234

1.32

(1.13–1.50)

227

1.47

(1.29–1.65)

307

1.28

(1.11–1.45)

300

1.35

(1.20–1.50)

156

1.49

(1.24–1.73)

151

1.57

(1.35–1.79)

5.00

0.002

4.44

0.004

0.96

0.411

0.79

0.490

81

7.14

(6.72–7.55)

74

7.40

(7.04–7.75)

141

8.43

(8.22–8.65)

131

8.50

(8.28–8.72)

424

7.77

(7.61–7.94)

412

7.75

(7.60–7.90)

778

8.33

(8.23–8.44)

754

8.34

(8.25–8.43)

263

7.53

(7.32–7.73)

254

7.44

(7.25–7.63)

233

8.39

(8.21–8.57)

227

8.42

(8.25–8.58)

307

7.86

(7.67–8.04)

300

7.86

(7.68–8.04)

156

8.53

(8.32–8.74)

151

8.42

(8.22–8.63)

4.31

0.005

0.67

0.579

4.63

0.003

1.03

0.377

80

9.24

(8.22–10.25)

73

8.32

(7.43–9.21)

141

11.91

(11.07–12.76)

131

10.88

(10.16–11.60)

424

8.58

(8.14–9.02)

409

8.35

(7.98–8.73)

776

10.51

(10.15–10.87)

749

10.35

(10.06–10.65)

263

7.54

(7.01–8.07)

253

7.93

(7.45–8.40)

233

9.94

(9.31–10.56)

227

10.56

(10.02–11.10)

307

8.13

(7.62–8.63)

299

8.15

(7.72–8.59)

156

10.38

(9.57–11.20)

151

10.83

(10.17–11.49)