TABLE 1.
Methylphenidate Treatment History, Childhood Characteristics, and Parent Mental Status of 176 ADHD Participants
| Category/ Predictor Variable |
Mean (SD) | Category/ Predictor Variable |
N (%) |
|---|---|---|---|
| Methylphenidate Treatment | Parent Lifetime Mental Disorder4 (yes, no) | ||
| 1. Age (years) at Initiation | 8.7 (1.6) | ||
| 2. Total Cum. Dose (mg) | 30,016 (26,791) | 7. Mothers | 49 (34) |
| 3. Duration (months) | 23.2 (18.6) | 8. Fathers | 44 (30) |
| Childhood Characteristics | 9. Either Parent | 75 (51) | |
| 4. Socioeconomic Status1 | 3.3 (1.0) | ||
| 5. Full Scale IQ2 | 104 (12) | ||
| 6. CTRS Hyperactivity3 | 2.3 (0.5) | ||
1
Hollingshead and Redlich (1958) index, ranging from 1 (upper class) to 5 (lower class)
2
Wechsler Intelligence Scale for Children (Wechsler, 1949, 1974)
3
Conners Teacher Rating Scale Hyperactivity Factor Score, ranging 0 to 3 (most severe)
4
Diagnostic interviews were obtained for the parents of 146 (83%) of the 176 participants