Journal of the Korean Academy of Child and Adolescent Psychiatry : eISSN 2233-9183 / pISSN 1225-729X

Table. 1.

Table. 1.

Characteristics of studies on QEEG subgroups in ADHD

Study (years) N Clinical characteristics Number of subgroups Results


ADHD Control Age Male (%)
Clarke et al. [55] (2001) 184 40 8-12 100 3 Cluster 1 (hypoarousal type): 42.3%
Cluster 2 (maturational lag type): 37.5%
Cluster 3 (hyperarousal type): 20.2%
Clarke et al. [60] (2011) 155 109 7-13 100 5 Cluster 1 (hyperarousal type): 23.2%
Cluster 2* (hypoarousal type): 11%
Cluster 3 (maturational lag type): 24.5%
Cluster 4* (hypoarousal type): 24.5%
Cluster 5: 16.8%
*Cluster 2 and 4 has a same QEEG profile. Total 35.5%
Loo et al. [61] (2018) 620 161 6-18 59 5 Delta group: 30%
Theta group: 23%
Alpha group: 20%
Beta group: 7%
No spectral elevation group: 20%
Byeon et al. [62] (2020) 59 (32; ADHD NOS) 15 7-12 78 4 Cluster 1 (maturational lag type): ADHD (46%), NOS (33%), NT (21%)
Cluster 2 (childhood depression): ADHD (30%), NOS (59%), NT (11%)
Cluster 3 (hypoarousal type): ADHD (47%), NOS (40%), NT (13%)
Cluster 4 (relatively normal): ADHD (13%), NOS(25%), NT (62%)

ADHD: attention deficit/hyperactivity disorder, NOS: not other specified, NT: neurotypical, QEEG: quantitative electroencephalogram

J Korean Acad Child Adolesc Psychiatry 2021;32:85-92 https://doi.org/10.5765/jkacap.210010
© 2021 J Korean Acad Child Adolesc Psychiatry