Table 4

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

Continuous student outcomesStudent view of school climateFriends’ contact with police in last yearStaff view of school organisational climate
Unadjusted effectAdjusted effectUnadjusted effectAdjusted effectUnadjusted effectAdjusted effect
Difference (95% CI)P valueDifference (95% CI)P valueDifference
(95% CI)
P valueDifference
(95% CI)
P valueDifference
(95% CI)
P valueDifference
(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