Table 1.
Demographic characteristics and key variables.
| Mean (standard deviation) | N available data in current analyses | |
|---|---|---|
| Median age of diagnosis (years) | 3.36 (interquartile interval Q1–Q3: 2.81–3.94) | n/a |
| Sex (% girls) | 15.8 | n/a |
| Mother ethnicity (% White) | 74.2 | n/a |
| Child IQ T6 (WISC) | 85.51 (18.74) | 187 |
| Median income category T5 | 9 (interquartile interval Q1–Q3: 7–11) | 190 |
| FILE total T5 | 8.87 (6.89) | 194 |
| FILE total T6 | 8.19 (6.46) | 204 |
| FILE total T7 | 6.97 (6.22) | 150 |
| FILE total T8 | 7.15 (5.24) | 163 |
| CBCL internalizing T5 | 8.45 (5.81) | 151 |
| CBCL internalizing T6 | 8.24 (6.27) | 144 |
| CBCL internalizing T7 | 10.01 (6.91) | 128 |
| CBCL internalizing T8 | 8.96 (6.24) | 123 |
| CBCL externalizing T5 | 11.25 (8.48) | 151 |
| CBCL externalizing T6 | 9.29 (8.85) | 144 |
| CBCL externalizing T7 | 9.38 (8.30) | 128 |
| CBCL externalizing T8 | 8.97 (8.18) | 123 |
| BRIEF shifting T score T5 | 62.13 (12.89) | 198 |
| BRIEF T5 age of assessment (years) | 7.75 (0.22) | n/a |
n/a: not applicable as variable not used in current analyses; WISC: Wechsler Intelligence Scale for Children; FILE: Family Inventory of Life Events and Changes; CBCL: Child Behavior Checklist; BRIEF: Behaviour Inventory Rating of Executive Function.