Table 2 Paired t-tests of SDQ total and subscales at t1 and t2
Valid obs | Mean t1 | Mean t2 | Difference t2-t1 | p-value | |
|---|---|---|---|---|---|
SDQ Total difficulties | 1052 | 11.1 | 11.7 | 0.6 | < 0.001 |
SDQ Emotional symptoms | 1104 | 3.4 | 3.9 | 0.5 | < 0.001 |
SDQ Peer problems | 1105 | 2.2 | 2.3 | 0.1 | 0.002 |
SDQ Inattention-hyperactivity | 1104 | 4.1 | 4.1 | 0.0 | 0.996 |
SDQ Conduct problems | 1104 | 1.4 | 1.4 | 0.0 | 0.674 |
SDQ Prosocial behavior | 1107 | 7.9 | 8.0 | 0.0 | 0.310 |
SDQ Internalizing problems | 1064 | 5.6 | 6.2 | 0.6 | < 0.001 |
SDQ Externalizing problems | 1067 | 5.5 | 5.5 | 0.0 | 0.839 |