Table 6 Results from linear mixed model of SDQ Internalising scores

Fixed effects

 Intercept

2.23 [1.42, 3.04] (0.39)**

2.48 [1.66, 3.32] (0.40)***

− 0.58 [− 2.42, 9.88] (2.63)

2.02 [1.11, 2.95] (0.46)***

1.96 [1.04, 2.91] (0.47)***

 Time

− 0.52 [− 0.88, − 0.17] (0.18)**

− 0.52 [− 1.55, − 0.56] (0.18)**

− 0.53 [− 0.88, − 0.17] (0.18)**

− 0.41 [− 0.91, 0.09] (0.25)

 Child age

0.46 [− 0.83, 1.04] (0.39)

 Gender

0.97 [− 0.13, 2.11] (0.57)

1.09 [− 0.06, 2.28] (0.60)

 Time x gender

− 0.24 [− 0.96, 0.47] (0.37)

Random effects variance

 Student

9.33

9.40

9.32

9.30

9.29

 Classroom

0.49

0.49

0.61

0.38

0.38

 Residual

2.28

2.16

2.16

2.16

2.17