Table 1.
Demographic information
| Demographic information | |||||
|---|---|---|---|---|---|
| Variable | value | p | Group difference* | ||
| Sample size (n) | 139 | ||||
| subtype | ADHD-H (%) | 71 (51.1%) | |||
| ADHD-I (%) | 35 (25.2%) | ||||
| ADHD-C (%) | 33 (23.7) | ||||
| Age | Mean (SD) | Total | 8.20 (2.50) | 0.001 | ADHD-H < ADHD-I |
| ADHD-H | 7.45 (2.45) | ||||
| ADHD-I | 9.54 (2.29) | ||||
| ADHD-C | 8.42 (2.26) | ||||
| Child order among siblings | 1st | ADHD-H/I/C | 41 / 18 / 27 | ||
| 2nd | ADHD-H/I/C | 22 / 8 / 5 | |||
| 3rd | ADHD-H/I/C | 8 / 7 / 0 | |||
| 4th | ADHD-H/I/C | 0 / 1 / 0 | |||
| 5th and higher | ADHD-H/I/C | 0 / 1 / 1 | |||
| Gender (n) | Male (female) | 112 (27) | |||
| CPRS-RS | Inattaention | ADHD-H (SD) | 26.97 (4.81) | 0.001 | ADHD-I > ADHD-H |
| ADHD-I (SD) | 40.60 (4.37) | ADHD-C > ADHD-H | |||
| ADHD-C (SD) | 42.72 (4.48) | ||||
| Hyperactivity | ADHD-H (SD) | 33.11 (4.37) | 0.001 | ADHD-H > ADHD-I | |
| ADHD-I (SD) | 23.42 (4.69) | ADHD-C > ADHD-I | |||
| ADHD-C (SD) | 40.66 (4.18) | ||||
| ADHD-index | ADHD-H (SD) | 59.14 (4.54) | 0.001 | ADHD-C > ADHD-I | |
| ADHD-I (SD) | 64.42 (6.26) | ADHD-C > ADHD-H | |||
| ADHD-C (SD) | 83.30 (7.40) | ||||
Note: SD Standard Deviation, ADHD-H Predominantly hyperactive, ADHD-I Predominantly inattentive, ADHD-C Combined, CPRS-RS Conners Parent Rating Scale-Revised: Short form. Between-group differences in demographic continuous variables were explored by F-test. * indicates that only significant group difference between ADHD subtypes are presented.