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Table 1 Unadjusted odds ratios (with 95% CI) for murderous ideation and behaviours (N = 5726)

From: Is involvement in school bullying associated with increased risk of murderous ideation and behaviours among adolescent students in China?

Category

%

Ideation

Plans

Preparation

Attempts

%

OR (95%CI)

%

OR (95%CI)

%

OR (95%CI)

%

OR (95%CI)

Total

100.0

9.9

 

2.8

 

1.3

 

0.6

 

Gender

 Male

49.7

12.2

1.00 [Ref]

3.9

1.00 [Ref]

2.1

1.00 [Ref]

1.0

1.00 [Ref]

 Female

50.3

7.7

0.60 (0.51 to 0.72)

1.6

0.41 (0.29 to 0.57)

0.6

0.28 (0.16 to 0.48)

0.1

0.14 (0.05 to 0.40)

Grade

 Grade 7 to 9

51.7

9.9

1.00 [Ref]

3.1

1.00 [Ref]

1.4

1.00 [Ref]

0.6

1.00 [Ref]

 Grade 10 to 12

48.3

10.0

1.02 (0.85 to 1.21)

2.4

0.77 (0.56 to 1.06)

1.2

0.86 (0.55 to 1.36)

0.5

0.73 (0.36 to 1.48)

Self-estimated family economic status

 Poor

9.6

12.9

1.00 [Ref]

3.6

1.00 [Ref]

1.0

1.00 [Ref]

0.5

1.00 [Ref]

 General

76.4

9.2

0.68 (0.54 to 0.86)

2.6

0.71 (0.47 to 1.07)

1.4

1.40 (0.67 to 2.94)

0.6

1.24 (0.43 to 3.54)

 Good

14.0

11.7

0.89 (0.64 to 1.25)

3.1

0.85 (0.46 to 1.56)

1.3

1.28 (0.46 to 3.55)

0.2

0.36 (0.40 to 3.26)

Family structure

 Nuclear family

66.2

9.8

1.00[Ref]

2.9

1.00[Ref]

1.5

1.00[Ref]

0.6

1.00[Ref]

 Big family

23.6

10.3

1.06 (0.86 to 1.30)

2.5

0.87 (0.59 to 1.29)

1.0

0.69 (0.38 to 1.23)

0.5

0.82 (0.35 to 1.90)

 Single-parent family

8.2

11.1

1.15 (0.85 to 1.57)

3.2

1.12 (0.65 to 1.93)

0.9

0.56 (0.20 to 1.56)

0.2

0.34 (0.05 to 2.49)

 Others

2.0

7.1

0.71 (0.34 to 1.47)

0.9

0.30 (0.04 to 2.20)

0.9

0.59 (0.08 to 4.30)

0.0

NA

Relationship with mother

 Poor

23.6

13.8

1.00 [Ref]

4.4

1.00 [Ref]

1.6

1.00 [Ref]

0.8

1.00 [Ref]

 Good

76.4

8.7

0.60 (0.50 to 0.72)

2.3

0.51 (0.37 to 0.71)

1.2

0.76 (0.46 to 1.25)

0.5

0.59 (0.28 to 1.22)

Relationship with father

 Poor

33.4

14.0

1.00 [Ref]

3.7

1.00 [Ref]

1.6

1.00 [Ref]

0.7

1.00 [Ref]

 Good

66.6

7.9

0.53 (0.44 to 0.63)

2.3

0.63 (0.46 to 0.86)

1.2

0.77 (0.48 to 1.22)

0.5

0.73 (0.36 to 1.48)

Number of friends

  < 3

25.1

12.4

1.00 [Ref]

3.6

1.00 [Ref]

0.8

1.00 [Ref]

0.2

1.00 [Ref]

  ≥ 3

74.9

9.1

0.70 (0.58 to 0.85)

2.8

0.68 (0.49 to 0.96)

1.5

1.99 (1.05 to 3.80)

0.7

3.26 (0.99 to 10.72)

  1. Note: % refers to percent of positive ideation, plans, preparation and attempts in each demographic category. OR - odds ratios; CI - confidence interval
  2. Variable levels significant at p < 0.05 are in boldface type