Table 4

Outcomes at 24-month and 36-month follow-up

Outcomes24 months36 months
Control n/N (%) or mean (SD), NIntervention n/N (%) or mean (SD), N (%)Unadjusted OR or MD (95% CI), p valueAdjusted OR or MD (95% CI), p valueControl n/N (%) or mean (SD)Intervention n/N (%) or mean (SD), N (%)Unadjusted OR or MD (95% CI), p valueAdjusted OR or MD (95% CI), p value
Cyberbullying victimisation443/3116 (14.2%)340/2993 (11.4%)OR=0.79
(0.63 to 0.99), 0.041
OR=0.77
(0.61 to 0.98), 0.035
347/2987 (11.6%)266/2754 (9.7%)OR=0.83
(0.65 to 1.05), 0.121
OR=0.80
(0.62 to 1.05), 0.110
Cyberbullying perpetration257/3112 (8.3%)229/2984 (7.7%)OR=0.93
(0.71 to 1.21), 0.572
OR=0.90
(0.67 to 1.19), 0.450
287/3008 (9.5%)193/2766 (7.0%)OR=0.66
(0.51 to 0.87), 0.003
OR=0.65
(0.48 to 0.88), 0.005
Perceived lack of school safety543/3106 (17.5%)568/2944 (7.7%)OR=1.39
(1.11 to 1.74), 0.004
OR=1.39
(1.10 to 1.75), 0.006
601/2919 (20.6%)532/2682 (19.8%)OR=1.08
(0.86 to 1.36), 0.495
OR=1.05
(0.83 to 1.34), 0.440
Student-reported observations of other students perpetrating aggressive behaviours at school2.43 (1.65), 31792.12 (1.71), 3063MD=−0.05
(−0.14 to 0.05), 0.344
MD=−0.08
(−0.18 to 0.01), 0.096
2.23 (1.77), 30692.07 (1.76), 2834MD=0.11
(0.01 to 0.20), 0.030
MD=0.10
(0.00 to 0.20), 0.049
Perpetration of aggressive behaviours in/outside school0.10 (0.44), 31490.08 (0.39), 3017MD=−0.014 (−0.037 to 0.009), 0.229MD=−0.009 (−0.034 to 0.015), 0.4560.12 (0.50), 30230.09 (0.43), 2778MD=−0.030
(−0.054 to −0.007), 0.012
MD=−0.031 (−0.056 to −0.006), 0.016
Participation in school disciplinary procedures2.74 (3.28), 31282.36 (3.12), 3009MD=−0.222 (−0.375 to −0.069), 0.004MD=−0.160 (−0.320 to 0), 0.0432.55 (3.21), 30172.15 (2.94), 2757MD=−0.326 (−0.484 to −0.169), <0.001MD=−0.320 (−0.480 to −0.150), <0.001
Truancy340/3088 (11.0%)299/2961 (10.1%)OR=0.93
(0.72 to 1.20), 0.582
OR=0.92
(0.70 to 1.21), 0.551
426/2981 (14.3%)294/2750 (10.7%)OR=0.66
(0.51 to 0.85), 0.001
OR=0.64
(0.49 to 0.84), 0.001
E-cigarette use558/3061 (18.2%)352/2913 (12.1%)OR=0.62
(0.45 to 0.86), 0.004
OR=0.60
(0.43 to 0.83), 0.002
630/2946 (21.4%)394/2692 (14.6%)OR=0.60
(0.44 to 0.83), 0.002
OR=0.59
(0.42 to 0.82), 0.002