Table 4. Intra-hemispheric coherence comparisons among ADHD+IGD (I), ADHD-only (A), and HC (C) groups.

Variables	ADHD+IGD	ADHD-only	HC	F, P value	Post hoc
Delta coherence
P4–O2	0.723 (0.139)	0.504 (0.167)	0.596 (0.144)	8.29, 0.001	I > A
Theta coherence
Fz–Cz	0.726 (0.077)	0.722 (0.067)	0.579 (0.200)	6.30, 0.004	I = A > C
F4–C4	0.670 (0.077)	0.600 (0.095)	0.524 (0.162)	6.06, 0.005	I > C
P4–O2	0.754 (0.096)	0.543 (0.163)	0.608 (0.138)	10.09, < 0.001	I > A = C
T4–T6	0.534 (0.122)	0.410 (0.121)	0.364 (0.159)	6.63, 0.003	I > A = C
Alpha coherence
P4–O2	0.709 (0.109)	0.493 (0.156)	0.509 (0.137)	12.39, < 0.001	I > A = C
Beta coherence
P4–O2	0.688 (0.097)	0.490 (0.150)	0.570 (0.125)	9.76, < 0.001	I > A = C

The intra-hemispheric coherence values were analyzed using ANOVA; Post hoc comparisons were carried out using Bonferroni correction; Data are presented as mean (SD).

ADHD = attention deficit hyperactivity disorder, IGD = internet gaming disorder, ADHD+IGD = ADHD comorbid with IGD group, ADHD-only = ADHD without comorbidity group, HC = healthy control group, ANOVA = analysis of variance, SD = standard deviation.