Table 1.

Demographic and clinical characteristics in IGD vs. HC

Characteristic	IGD (N=31)	HC (N=42)	Test statistics	p
Sex (male)	30 (96.77)	35 (83.33)	t=-1.834	0.071
Age (yr)	23.387±3.422	24.167±3.020	t=-1.030	0.306
Online gaming on weekday (h/day)	2.806±2.716	1.929±1.069	t=1.908	0.060
Online gaming on weekend (h/day)	3.355±3.176	2.167±1.248	t=2.209	0.030*
Y-IAT-K	59.806±15.281	30.143±9.257	t=10.293	<0.001*
BDI-II	13.419±9.821	3.476±4.301	t=5.855	<0.001*
BAI	13.032±12.566	3.190±4.341	t=4.718	<0.001*
BAS reward response	14.581±2.487	13.262±2.142	t=2.428	0.018*
BAS drive	10.484±2.448	10.119±2.027	t=0.696	0.489
BAS fun seeking	10.161±2.570	9.571±2.286	t=1.034	0.305
BAS total	35.226±5.948	32.952±5.161	t=1.743	0.086
BIS	19.806±4.672	17.714±3.424	t=2.209	0.030*

Values are presented as number (%) or mean±standard deviation. Independent t-test was used to compare means in two groups. Online gaming in weekday/weekend: average online gaming use time per day on weekday and weekend.

^*p<0.05.

IGD, internet gaming disorder; HC, healthy control; Y-IAT-K, Young’s Internet Addiction Test Korean version; BDI-II, Beck Depression Inventory-II; BAI, Beck Anxiety Inventory; BAS, Behavioral Activation System; BIS, Behavioral Inhibition System