Table 1.
Mean Differences Between Physician and Parent Reports of Total Daily Dosage of Attention-Deficit/Hyperactivity Disorder (ADHD) Medications
| Pairs | Mean | Standard deviation | t | df | Sig | r |
|---|---|---|---|---|---|---|
| Grade 1 | ||||||
| Physician | 23.18 | 12.15 | ||||
| Parent | 21.69 | 12.67 | 0.55 | 26 | 0.59 | 0.11 |
| Grade 2 | ||||||
| Physician | 22.13 | 12.23 | ||||
| Parent | 24.30 | 13.80 | −0.96 | 37 | 0.34 | 0.16 |
| Grade 3 | ||||||
| Physician | 26.92 | 15.22 | ||||
| Parent | 29.35 | 19.42 | −0.84 | 44 | 0.41 | 0.13 |
| Grade 4 | ||||||
| Physician | 28.99 | 16.41 | ||||
| Parent | 26.15 | 14.74 | 1.33 | 40 | 0.19 | 0.21 |
| Grade 5 | ||||||
| Physician | 30.10 | 16.31 | ||||
| Parent | 26.49 | 11.93 | 1.69 | 41 | 0.10 | 0.26 |
| Grade 6 | ||||||
| Physician | 33.58 | 22.47 | ||||
| Parent | 29.64 | 13.49 | 1.49 | 43 | 0.15 | 0.22 |
| Grade 7 | ||||||
| Physician | 35.97 | 22.86 | ||||
| Parent | 33.93 | 20.73 | 0.81 | 42 | 0.42 | 0.12 |
| Grade 8 | ||||||
| Physician | 38.98 | 18.93 | ||||
| Parent | 34.09 | 18.41 | 1.52 | 41 | 0.14 | 0.23 |
| Grade 9 | ||||||
| Physician | 37.92 | 16.12 | ||||
| Parent | 37.33 | 21.32 | 0.19 | 40 | 0.85 | 0.03 |
| Grade 10 | ||||||
| Physician | 36.60 | 16.45 | ||||
| Parent | 34.42 | 21.40 | 0.58 | 28 | 0.57 | 0.11 |
| Grade 11 | ||||||
| Physician | 45.80 | 37.83 | ||||
| Parent | 40.14 | 37.21 | 1.77 | 22 | 0.09 | 0.35 |
r=0.10, small effect; r=0.30, medium effect; r=0.50, large effect. Pre-kindergarten, kindergarten, and Grade 12 results were not included because of the small sample size. Doses of ADHD medications were standardized for an immediate-release methylphenidate formula.