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Table 3 Model-based means for the group using time-repeated measures analyses

From: Accessible mental well-being intervention for adolescents in school settings: a single-group intervention study using a pretest–post-test design

Dependent

Effect

Group

Timepoint

Estimate

95% CI

Pa

YP-CORE

School x time

Lower secondary school

Baseline

20.86

18.26–23.44

 < 0.001

 

6 weeks

19.25

16.67–21.84

 < 0.001

 

6 months

22.19

19.31–25.08

 < 0.001

Upper secondary school

Baseline

21.05

18.76–23.35

 < 0.001

 

6 weeks

15.32

13.03–17.61

 < 0.001

 

6 months

16.71

14.21–19.20

 < 0.001

Vocational school

Baseline

19.33

15.65–23.00

 < 0.001

 

6 weeks

16.34

12.67–20.02

 < 0.001

 

6 months

17.43

13.24–21.63

 < 0.001

BDI-II

School x time

Lower secondary school

Baseline

23.00

19.18–26.82

 < 0.001

 

6 weeks

23.48

19.13–27.84

 < 0.001

 

6 months

23.50

17.93–29.06

 < 0.001

Upper secondary school

Baseline

21.13

17.82–24.43

 < 0.001

 

6 weeks

16.00

12.13–19.85

 < 0.001

 

6 months

16.45

11.59–21.31

 < 0.001

Vocational school

Baseline

21.23

15.79–26.67

 < 0.001

 

6 weeks

14.56

8.37–20.75

 < 0.001

 

6 months

14.48

6.42–22.53

 < 0.001

OASIS

School x time

Lower secondary school

Baseline

10.11

8.73–11.49

 < 0.001

 

6 weeks

8.93

7.46–10.39

 < 0.001

 

6 months

9.53

7.76–11.30

 < 0.001

Upper secondary school

Baseline

9.63

8.44–10.82

 < 0.001

 

6 weeks

7.99

6.67–9.31

 < 0.001

 

6 months

8.25

6.70–9.80

 < 0.001

Vocational school

Baseline

11.26

9.30–13.22

 < 0.001

 

6 weeks

7.19

5.11–9.27

 < 0.001

 

6 months

7.53

4.97–10.09

 < 0.001

  1. YP-CORE = The Young Persons Clinical outcomes for routine Evaluation, BDI-II = Beck Depression Inventory, OASIS = The Overall Anxiety Severity and Impairment Scale, 95% CI = 95% Confidence Interval
  2. aLinear mixed model