TABLE 3.
Distributions of externalizing problems over time (% (n/N))
| Girls | Boys | |||||||
|---|---|---|---|---|---|---|---|---|
| 2002–2003 | 2012–2013 | 2018–2019 | p* | 2002–2003 | 2012–2013 | 2018–2019 | p* | |
| Lifetime | ||||||||
| drunkenness | 41.6 (290/697) | 21.9 (143/653) | 9.7 (63/649) | <0.001 | 38.9 (304/781) | 17.6 (110/624) | 11.1 (77/691) | <0.001 |
| Frequent | ||||||||
| drunkenness | 16.8 (117/695) | 27.0 (176/651) | 4.4 (29/662) | <0.001 | 20.4 (159/781) | 16.5 (104/629) | 4.8 (34/702) | <0.001 |
| Cannabis use | 11.1 (78/700) | 5.3 (35/656) | 5.2 (34/653) | <0.001 | 12.1 (95/782) | 9.6 (60/628) | 6.2 (43/695) | <0.001 |
| Delinquency | 18.2 (127/699) | 9.0 (59/656) | 7.2 (48/667) | <0.001 | 16.1 (126/781) | 6.5 (41/633) | 5.7 (40/702) | <0.001 |
| Bullying others | 1.9 (13/697) | 0.3 (2/650) | 0.4 (3/669) | 0.003 | 5.6 (44/781) | 2.1 (13/628) | 1.1 (8/702) | <0.001 |
| Playing truant | 4.0 (24/600) | 3.9 (22/557) | 2.8 (17/605) | 0.5 | 3.6 (25/690) | 3.1 (17/547) | 1.6 (10/625) | 0.07 |
Note. *P-values were calculated by Chi-square test