Table 5.
Sibling bullying roles and trajectories of parent-report mental health difficulties during adolescence
| Internalizing problems Unstandardized beta [95% CI] |
Externalizing problems Unstandardized beta [95% CI] |
|
|---|---|---|
| Sibling bullying involvement group (Age 11) | ||
| Uninvolved | 0 [Reference] | 0 [Reference] |
| Victim-only | 0.87 [0.33, 1.42] | 1.30 [0.80, 1.80] |
| Bully-only | 0.65 [−0.37, 1.68] | 1.83 [0.81, 2.85] |
| Bully-victim | 0.90 [0.42, 1.38] | 1.88 [1.41, 2.35] |
| Age | 0.12 [0.10, 0.14] | −0.09 [−0.11, −0.07] |
| Sibling bullying involvement group × age interactions | ||
| Uninvolved × Age | 0 [Reference] | 0 [Reference] |
| Victim-only × Age | −0.02 [−0.06, 0.02] | −0.07 [−0.11, −0.04] |
| Bully-only × Age | −0.03 [−0.10, 0.05] | −0.08 [−0.15, −0.01] |
| Bully-victim × Age | −0.03 [−0.07, −0.00] | −0.10 [−0.13, −0.06] |
| Sex | ||
| Girls | 0 [Reference] | 0 [Reference] |
| Boys | −0.25 [−0.37, −0.13] | 0.82 [0.70, 0.95] |
| Poverty | ||
| No | 0 [Reference] | 0 [Reference] |
| Yes | 0.89 [0.73, 1.05] | 1.04 [0.70, 0.95] |
| Pre-existing mental health difficulties | 0.36 [0.33, 0.38] | 0.36 [0.34, 0.38] |
Bold font indicates confidence intervals that did not cross zero
The models were repeated so that the mean and trajectories of all sibling bullying groups were compared to each other. These comparisons are shown in the Supplementary materials (see Table S8)