· Suicidal ideation

○ Yes

174 (41.8)

<0.001

27 (6.5)

0.740

215 (51.7)

<0.001

416 (15.6)

○ No

624 (27.7)

48 (2.1)

1579 (70.2)

2251 (84.4)

· Deliberate self-harm

○ Yes

103 (44.2)

0.002

16 (6.9)

0.917

114 (48.9)

<0.001

233 (8.7)

○ No

695 (28.6)

59 (2.4)

1680 (69.0)

2434 (91.3)

School apathy and academic achievement

· Unhappiness

○ Yes

102 (39.5)

0.037

18 (7.0)

0.849

138 (53.5)

<0.001

258 (9.7)

○ No

696 (28.9)

57 (2.4)

1 656(68.7)

2 409 (90.3)

· Academic achievement

○ My average is low and I’m not doing well at all

558 (34.8)

<0.001

55 (3.4)

0.668

991 (61.8)

<0.001

1604 (60.1)

○ I’m one of the best averages and I’m doing well

240 (22.6)

20 (1.9)

803 (75.5)

1063 (39.9)

· Educational expectation

○ No

113 (44.7)

<0.001

16 (6.3)

0.988

124 (49.0)

<0.001

253 (9.5)

○ Yes

685 (28.4)

59 (2.4)

1670 (69.2)

2414 (90.5)

Violent behaviors

· Cyberbullying

○ >3 times/6 months

234 (34.6)

0.093

29 (4.3)

0.843

413 (61.1)

0.002

676 (25.3)

○ Never or less than 3 times/6 months

564 (28.3)

46 (2.3)

1381 (69.4)

1991 (74.7)

· Physical violence (Fighting)

○ >3 times/6 months

207 (43.1)

<0.001

40 (8.3)

0.433

233 (48.6)

<0.001

480 (18.0)

○ Never or less than 3 times/6 months

591 (27.0)

35 (1.6)

1561 (71.4)

2187 (82.0)

· Use of knives or other weapons

○ >3 times/6 months

63 (52.5)

<0.001

20 (16.7)

0.071

37 (30.8)

<0.001

120 (4.5)

○ Never or less than 3 times/6 months

735 (28.9)

55 (2.1)

1757 (69.0)

2547 (95.5)

· Risky Sex

○ Yes

104 (38.9)

0.050

30 (11.2)

0.220

133 (49.8)

<0.001

267 (10.0)

○ No

694 (28.9)

45 (1.8)

1661 (69.2)

2400 (90.0)