Number of days on which the followings were experienced relating to smart device use in the last week
	None	1–2 days	3–4 days	5–6 days	Everyday
17.Eye discomfort	□	□	□	□	□
18.Musculoskeletal discomfort	□	□	□	□	□
19.Sleep deprivation	□	□	□	□	□
20.Family conflict	□	□	□	□	□
21.Cyberbullying victimization	□	□	□	□	□