Table 1.
Demographic characteristics of different groups.
| Category | Item | 4-year-old group (N = 137) | 5-year-old group (N = 253) | ||
|---|---|---|---|---|---|
| ADHD group 1 (N = 45) |
Symptom-like group 1 (N = 92) |
ADHD group 2 (N = 120) |
Symptom-like group 2 (N = 132) |
||
| Child's age (in years) | 4.53 ± 0.26 | 4.54 ± 0.28 | 5.47 ± 0.29 | 5.50 ± 0.28 | |
| Child's gender (N) | Female | 14 | 9 | 26 | 42 |
| Male | 31 | 81 | 94 | 90 | |
| Birth weight (N) | Less than 2.5 kg | 1 | 3 | 4 | 5 |
| 2.5 kg–4.0 kg | 34 | 60 | 78 | 79 | |
| More than 4.0 kg | 2 | 4 | 3 | 4 | |
| Missing data | 8 | 25 | 35 | 44 | |
| Gestational age (N) | Less than 37 weeks (preterm) | 4 | 6 | 7 | 5 |
| 37–42 weeks (full term) | 33 | 61 | 82 | 85 | |
| Missing value | 8 | 25 | 31 | 42 | |
| Birth delivery mode (N) | Vaginal delivery | 17 | 25 | 48 | 44 |
| Cesarean delivery | 8 | 27 | 21 | 23 | |
| Missing data | 20 | 40 | 51 | 65 | |