Table 1 Demographic characteristics, problematic cellular phone use, and adverse mental health conditions.

Male (N = 11,111)

5,524 (49.7)

Age ≥ 15 years (N = 11,111)

5,431 (48.9)

Problematic cellular phone use (N = 11,111)

1,827 (16.4)

Perpetrated aggression (N = 11,111)

2,563 (23.1)

Victim of aggression (N = 10,990)

1,144 (10.3)

Had a tattoo (N = 10,975)

158 (1.4)

Insomnia (N = 10,922)

1,323 (12.1)

Short nocturnal sleep duration (N = 10,875)

1,388 (12.5)

Low self-esteem (N = 11,111)

1,771 (15.9)

Smoked cigarettes (N = 11,008)

632 (5.7)

Chewed betel nuts (N = 10,968)

142 (1.3)

Consumed alcohol (N = 10,993)

597 (5.4)

Used illicit drugs (N = 11,005)

151 (1.4)

Suspended from school (N = 11,046)

272 (2.4)

Had suicidal tendencies (N = 11,018)

3,245 (29.2)

Had a criminal record (N = 10,674)

335 (3.0)

Had unprotected sex (N = 10,398)

269 (2.4)