Table 3 Linear mixed models for scores pre- and postintervention. The intercept indicates the expected baseline value of each score when all predictors in the model are zero, serving as the reference point from which other effects are measured

(Intercept)

6.70

4.84–8.56

<0.001

7.73

6.63–8.83

<0.001

19.36

13.26–25.46

<0.001

Male

−0.88

−1.76 to 0.00

0.051

−0.52

−1.04 to 0.00

0.051

−3.38

−6.28 to 0.49

0.024

Age 11–14

0.04

−1.23 to 1.32

0.948

0.41

−0.35 to 1.17

0.275

0.30

−3.89 to 4.49

0.883

Age 15–21

−0.61

−2.05 to 0.82

0.387

0.43

−0.42 to 1.28

0.312

−2.28

−7.00 to 2.44

0.330

Primary caregiver [mother]

−0.65

−2.37 to 1.08

0.448

−0.14

−1.15 to 0.87

0.778

−1.85

−7.52 to 3.82

0.507

Primary caregiver [father]

−1.71

−4.26 to 0.84

0.181

0.62

−0.88 to 2.12

0.404

−3.92

−12.27 to 4.44

0.344

Primary caregiver [father and mother]

−1.09

−4.01 to 1.83

0.448

−0.40

−2.11 to 1.32

0.638

−1.52

−11.11 to 8.08

0.747

Education [high school]

0.57

−0.54 to 1.68

0.303

−0.40

−1.04 to 0.25

0.222

1.43

−2.22 to 5.07

0.429

Education [college]

2.38

0.42 to 4.35

0.019

−0.60

−1.77 to 0.57

0.300

7.58

1.23 to 13.93

0.021

Post intervention score

3.28

2.64 to 3.92

<0.001

1.93

1.48 to 2.38

<0.001

9.31

7.66 to 10.96

<0.001

Random effects

σ²

1.69

0.83

11.29

τ₀₀

0.37 _id

0.00 _id

7.44 _id

ICC

0.18

0.40

N

35_id

35_id

35_id

Observations

69

68

69

Marginal R²/Conditional R²

0.595/0.667

0.566/NA

0.580/0.747