Table 1 Descriptive statistics for sample variables and scales
| Â | Scale range (Maximum score) | Mean (SD) | N | ||
|---|---|---|---|---|---|
NDD factor | 0 – 23.45 (–a) | 1.86 (2.84) | 5708 | ||
Depression symptoms at age 9 (SMFQ) | 0 – 25 (26) | 0.82 (2.03) | 5137 | ||
Anxiety symptoms at age 9 (SCARED) | 0 – 63 (82) | 4.72 (5.84) | 4517 | ||
Internalizing symptoms at age 15 (SDQ) | 0 – 10 (10) | 1.27 (1.72) | 4492 | ||
Sex, n (%) | |||||
♂ | ♀ | ||||
2128 (47.4) | 2364 (52.6) | ||||
Birth year n (%) | |||||
1998 | 1999 | 2000 | 2001 | 2002 | 2003 |
483 (10.8) | 864 (19.2) | 802 (17.9) | 783 (17.4) | 759 (16.9) | 801 (17.8) |