Table 2.

Psychological characteristics of participants, according to content type of smartphone use.

Psychological Characteristics		Study (n = 4202, 10.7%)	SNS (n = 10,192, 25.9%)	Game (n = 7282, 18.5%)	Entertainment (n = 17,642, 44.9%)	p
Subjective Stress						< 0.001
	High	37.1	41.1	30.3	38.0
	Middle	40.9	42.0	43.2	42.1
	Low	22.0	16.6	26.5	19.8
Current Cigarette Smoking						0.694
	No	93.4	93.2	93.6	93.3
	Yes	6.6	6.8	6.4	6.7
Current Alcohol Drinking						< 0.001
	No	77.7	74.7	77.4	75.5
	Yes	22.3	25.3	22.6	24.5
Depressive Mood						< 0.001
	No	76.2	71.1	82.5	76.2
	Yes	23.8	28.9	17.5	23.8
Suicidal Ideation						< 0.001
	No	89.5	85.3	90.6	87.7
	Yes	10.5	14.7	9.4	12.3

SNS: Social-Networking Services.