Table 2.
The difference in LDAEP between low and high impulsivity group
| Variable | Low impulsivity group (n = 17) | High impulsivity group (n = 16) | pvalue |
|---|---|---|---|
| Age | 9.53 ± 1.54 | 8.69 ± 1.85 | 0.179 |
| LDAEP_baseline | 0.43 ± 0.76 | 1.07 ± 1.14 | 0.043a |
| Total IQ | 111 ± 15 | 107 ± 12 | 0.567 |
| ADHD rating scale | |||
| Total ARS | 18.8 ± 7.2 | 27.4 ± 11.6 | 0.080 |
| Inattention ARS | 9.7 ± 4.2 | 14.5 ± 6.1 | 0.096 |
| Hyperactivity-Impulsivity ARS | 8.7 ± 4.2 | 14.3 ± 7.1 | 0.072 |
| Continuous performance test (T score) | |||
| Visual omission error | 55.1 ± 18.4 | 64.8 ± 16.8 | 0.008 |
| Visual commission error | 53.6 ± 5.8 | 81.13 ± 13.2 | < 0.001 |
| Visual reaction time | 60.7 ± 10.5 | 57.5 ± 11.2 | 0.402 |
| Visual reaction time SD | 54.2 ± 12.5 | 65.8 ± 16.3 | 0.031 |
| Auditory omission error | 66.76 ± 16.7 | 58.33 ± 19.1 | 0.114 |
| Auditory commission error | 57.1 ± 9.9 | 63.5 ± 20.1 | 0.710 |
| Auditory reaction time | 71.0 ± 7.1 | 61.6 ± 11.0 | 0.006 |
| Auditory reaction time SD | 54.82 ± 11.1 | 52.4 ± 10.4 | 0.682 |
Values are presented as mean ± standard deviation.
LDAEP, loudness dependence of the auditory evoked potential; ADHD, attention deficit hyperactivity disorder; SD, standard deviation; ARS, ADHD rating scale; IQ, intellectual quotient.
The high-impulsivity group had a T score of ≥65 and the low-impulsivity group had a T score of < 65. The two groups of subjects showed signicantly dierent LDAEP levels (F = 4.539, p= 0.043) after controlling age and IQ as covariates. Mann Whitney Utest was conducted to compare two groups.
aANCOVA after adjusting for age and total IQ.