Table 4

Effects of potential mediators at interim follow-up on outcomes at the final follow-up

Continuous student outcomes Student view of school climate Friends’ contact with police in last year Staff view of school organisational climate
Unadjusted effect Adjusted effect Unadjusted effect Adjusted effect Unadjusted effect Adjusted effect
Difference (95% CI) P value Difference (95% CI) P value Difference
(95% CI)
P value Difference
(95% CI)
P value Difference
(95% CI)
P value Difference
(95% CI)
P value
Bullying victimisation (GBS overall score)−0.20
(−0.24 to −0.17)
<0.001−0.22
(−0.25 to −0.18)
<0.0010.12
(0.08 to 0.15)
<0.0010.12
(0.09 to 0.16)
<0.001−0.01
(−0.04 to 0.04)
0.6170.00
(−0.03 to 0.04)
0.841
Aggression perpetration (ESYTC overall score)−2.49
(−2.87 to −2.11)
<0.001−2.57
(−2.96 to −2.18)
<0.0012.73
(2.34 to 3.11)
<0.0012.72
(2.32 to 3.11)
<0.001−0.20
(−0.59 to 0.19)
0.3170.07
(−0.36 to 0.50)
0.742
Quality of life (PedsQL overall score)5.81
(4.84 to 6.77)
<0.0015.84
(4.87 to 6.81)
<0.001−2.03
(−3.00 to −1.07)
<0.001−2.40
(−3.36 to −1.44)
<0.001−0.50
(−1.58 to 0.59)
0.3720.29
(−0.70 to 1.27)
0.568
Psychological functioning (SDQ total difficulties score−3.17
(−3.54 to −2.79
<0.001−3.21
(−3.59 to −2.83)
<0.0011.17
(0.80 to 1.55)
<0.0011.31
(0.93 to 1.69)
<0.0010.01
(−0.39 to 0.41)
0.9670.06
(−0.33 to 0.45)
0.773
SWEMWBS total well-being index)3.83
(3.44 to 4.22)
<0.0013.91
(3.51 to 4.31)
<0.001−0.71
(−1.12 to −0.31)
0.001−0.81
(−1.22 to −0.40)
<0.0010.12
(−0.28 to 0.53)
0.5550.23
(−0.19 to 0.64)
0.284
Health utility (CHU9D overall score)0.06
(0.05 to 0.06)
<0.0010.06
(0.05 to 0.07)
<0.001−0.02
(−0.03 to −0.01)
<0.001−0.02
(−0.03 to −0.01)
<0.001−0.00
(−0.01 to 0.00)
0.3870.00
(−0.01 to 0.01)
0.583
Age of sexual debut−0.16
(−1.04 to 0.72)
0.7240.09
(−0.81 to 1.00)
0.8370.61
(−0.22 to −1.43)
0.1490.46
(−0.37 to 1.29)
0.281−0.46
(−1.41 to 0.50)
0.348−0.95
(−2.02 to 0.12)
0.082
Bullying perpetration (MAS bullying subscale score)−1.54
(−1.75 – −1.33)
<0.001−1.53
(−1.74 to −1.33)
<0.0011.55
(1.34 to 1.77)
<0.0011.46
(1.25 to 1.67)
<0.001−0.13
(−0.58 to 0.31)
0.5590.10
(−0.20 to 0.39)
0.517