Table 2.
Comparison of Those Followed Up and Those Not Contacted on Baseline Measures.
| Hyperactive |
Control |
|||||
|---|---|---|---|---|---|---|
| Followed up M (SD) | Not interviewed M (SD) | p | Followed up M (SD) | Not interviewed M (SD) | p | |
| n | 40 | 23 | 25 | 8 | ||
| IQ | 100 (14.8) | 97 (17.1) | .39 | 103 (14.2) | 102 (8.9) | .90 |
| CRS | 12 (4.7) | 13 (4.8) | .11 | 2.3 (2.8) | 4.1 (2.2) | .10 |
| B2 Total | 14 (6.9) | 12 (6.4) | .39 | 4.2 (3.3) | 6.0 (3.7) | .19 |
| A2 Total | 15 (5.9) | 14 (7.5) | .47 | 9.5 (5.2) | 8.8 (4.8) | .73 |
| SES | 4.1 (1.0) | 4.5 (0.9) | .08 | 3.8 (1.1) | 4.6 (0.8) | .09 |
Note: IQ: score on four subtests of Wechsler Intelligence Scale for Children-Revised (WISC-R); CRS = score on hyperactivity items of Conners’ Classroom Rating Scale; B2 Total = sum of behavioral problems from Rutter B(2) teacher rating scale; A2 Total = behavioral problems from Rutter A(2) parent rating scale; SES = socioeconomic status from Registrar-Generals classification of occupations (range = 1-6, 1 denoting highest occupational level). The table shows the mean scores and standard deviations on variables measured at the first contact with the project, at age approximately 7 years; according to whether contact was achieved at follow-up.