Table 1. Demographic characteristics of the participants.

		N (%)
Age (years)	10	1 (0.6)
	11	27 (16.7)
	12	87 (53.7)
	13	20 (12.3)
	14	10 (6.2)
	15	16 (9.9)
	16	1 (0.6)
Gender	Male	85 (52.5)
	Female	77 (47.5)
IGUESS	1~9	141 (87.0)
	≤10	21 (13.0)
SAS-SV a	≥22	132 (82.0)
	≤ 23	29 (18.0)

IGUESS, Internet Game Use-Elicited Symptom Screen [37]; SAS-SV, Smartphone Addiction Proneness Scale–Short Version [38].

^a n = 161.