Table 1.
Descriptive Statistics Across Waves 1 Through 8
| Wave 1 | Wave 2 | Wave 3 | Wave 4 | Wave 5 | Wave 6 | Wave 7 | Wave 8 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Males |
|
|
|
|
|
|
|
|
||||||||
| Total N |
525 |
337 |
334 |
226 |
229 |
249 |
224 |
177 |
||||||||
| % with ADHD |
68.38 |
67.06 |
67.37 |
66.37 |
63.32 |
61.04 |
61.16 |
59.32 |
||||||||
| |
M
|
SD
|
M
|
SD
|
M
|
SD
|
M
|
SD
|
M
|
SD
|
M
|
SD
|
M
|
SD
|
M
|
SD
|
| Age | 9.68 | 1.54 | 10.44 | 1.50 | 11.50 | 1.53 | 12.53 | 1.50 | 13.73 | 1.49 | 14.32 | 1.42 | 15.12 | 1.35 | 15.59 | 0.88 |
| Pubertal Stage | 1.41 | 0.60 | 1.49 | 0.73 | 1.86 | 0.99 | 2.02 | 1.21 | 2.89 | 1.30 | 3.34 | 1.24 | 3.81 | 1.04 | 4.18 | 0.83 |
| Inattention | 4.51 | 3.39 | 4.34 | 3.61 | 3.82 | 3.46 | 5.06 | 3.47 | 4.17 | 3.39 | 2.86 | 3.23 | 2.14 | 3.16 | 1.13 | 2.80 |
| Hyperactivity | 2.28 | 2.07 | 2.00 | 2.09 | 1.47 | 1.84 | 2.06 | 1.44 | 1.26 | 1.70 | 0.99 | 1.62 | 0.64 | 1.50 | 0.25 | 0.71 |
| Impulsivity | 1.05 | 1.19 | 1.03 | 1.17 | 0.74 | 1.05 | 0.94 | 0.93 | 0.61 | 0.94 | 0.53 | 0.95 | 0.21 | 0.58 | 0.25 | 0.71 |
| Depression | 8.20 | 6.35 | 7.54 | 6.72 | 5.86 | 5.61 | 7.25 | 6.40 | 6.66 | 5.74 | 6.93 | 6.35 | 6.75 | 6.19 | 6.90 | 6.71 |
| Impairment | 71.99 | 12.78 | 72.70 | 12.00 | 74.55 | 11.76 | 74.95 | 12.01 | 74.96 | 12.87 | 77.32 | 11.61 | 79.04 | 12.62 | 79.30 | 14.86 |
| Females | ||||||||||||||||
| Total N | 324 | 195 | 196 | 137 | 121 | 150 | 137 | 128 | ||||||||
| % with ADHD | 46.30 | 51.28 | 48.98 | 47.45 | 47.93 | 42.67 | 40.88 | 38.28 | ||||||||
| M | SD | M | SD | M | SD | M | SD | M | SD | M | SD | M | SD | M | SD | |
| Age | 9.62 | 1.58 | 10.28 | 1.50 | 11.31 | 1.44 | 12.34 | 1.49 | 13.38 | 1.47 | 14.02 | 1.24 | 14.98 | 1.19 | 15.67 | 0.98 |
| Pubertal Stage | 1.94 | 0.95 | 1.92 | 0.94 | 2.40 | 1.05 | 3.13 | 1.39 | 3.57 | 1.10 | 4.03 | 0.79 | 4.41 | 0.65 | 4.64 | 0.55 |
| Inattention | 3.31 | 3.60 | 2.85 | 3.29 | 2.57 | 3.07 | 3.11 | 3.82 | 3.63 | 3.50 | 1.92 | 2.74 | 2.33 | 2.25 | 2.23 | 3.22 |
| Hyperactivity | 1.40 | 1.92 | 1.17 | 1.85 | 0.94 | 1.57 | 1.33 | 1.66 | 0.83 | 1.43 | 0.44 | 0.97 | 0.67 | 1.63 | 0.54 | 1.05 |
| Impulsivity | 0.69 | 1.04 | 0.63 | 1.05 | 0.47 | 0.85 | 0.78 | 1.20 | 0.46 | 0.96 | 0.36 | 0.74 | 0.50 | 0.84 | 0.15 | 0.38 |
| Depression | 7.28 | 6.63 | 7.66 | 6.96 | 6.62 | 6.45 | 8.81 | 8.62 | 10.11 | 9.28 | 9.84 | 8.51 | 9.72 | 9.11 | 8.62 | 7.03 |
| Impairment | 76.63 | 11.95 | 77.50 | 11.69 | 77.76 | 10.89 | 79.31 | 12.69 | 78.31 | 11.79 | 79.11 | 13.16 | 78.75 | 9.83 | 80.49 | 11.49 |
Note. Inattention, hyperactivity, and impulsivity symptom counts were determined using the KSADS data. Depression refers to total raw scores on the CDI. Impairment was determined utilizing the GAF based on parent responses from the KSADS.