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Table 4 Multivariate logistic regression of adolescent murderous ideation and behaviours on frequency of school bullying (N = 5726)

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

Frequency of school bullying % Ideation Plans Preparation Attempts
% aOR (95% CI)a % aOR (95% CI)b % aOR (95% CI) c % aOR (95% CI) d
Bully
 Non-involved 62.3 6.3 1 [Reference] 1.7 1 [Reference] 0.7 1 [Reference] 0.3 1 [Reference]
 Less than twice a month 19.3 11.0 1.76 (1.39 to 2.22) 1.9 1.04 (0.63 to 1.72) 0.6 0.79 (0.34 to 1.82) 0.1 0.25 (0.03 to 1.97)
 Two or three times a month 8.1 16.5 2.72 (2.05 to 3.61) 3.2 1.68 (0.94 to 3.00) 1.3 1.55 (0.63 to 3.80) 0.2 0.58 (0.07 to 4.47)
 Once a week 4.8 26.2 4.70 (3.46 to 6.38) 6.9 3.59 (2.10 to 6.15) 3.6 4.32 (2.05 to 9.14) 0.7 1.81 (0.40 to 8.27)
 Multiple times per week 5.5 23.2 3.92 (2.90 to 5.31) 13.7 7.26 (4.76 to 11.09) 8.6 9.79 (5.23 to 17.33) 5.4 12.45 (5.65 to 27.41)
 Score of frequency    1.49 (1.40 to 1.58)   1.64 (1.48 to 1.82)   1.82 (1.57 to 2.11)   2.00 (1.59 to 2.51)
Victim
 Non-involved 42.1 6.2 1 [Reference] 1.7 1 [Reference] 0.9 1 [Reference] 0.5 1 [Reference]
 Less than twice a month 22.6 8.3 1.31 (1.01 to 1.69) 1.9 1.05 (0.64 to 1.73) 0.8 0.85 (0.40 to 1.81) 0.0 NA
 Two or three times a month 13.2 12.1 1.94 (1.47 to 2.56) 2.4 1.24 (0.71 to 2.18) 0.9 0.99 (0.42 to 2.34) 0.1 0.26 (0.03 to 1.98)
 Once a week or more 8.4 13.8 2.11 (1.55 to 2.89) 3.8 1.82 (1.03 to 3.21) 1.7 1.70 (0.74 to 3.87) 0.6 1.10 (0.31 to 3.98)
 Multiple times per week 13.8 19.7 3.15 (2.46 to 4.03) 7.1 3.37 (2.22 to 5.11) 3.8 3.80 (2.14 to 6.74) 2.2 3.53 (1.63 to 7.64)
 Score of frequency    1.33 (1.25 to 1.41)   1.36 (1.23 to 1.51)   1.43 (1.23 to 1.65)   1.53 (1.22 to 1.93)
  1. Note: % refers to percent of positive ideation, plans, preparation and attempts in each type of school bullying experience
  2. a Model adjusted for gender, self-estimated family economic status, relationship with mother, relationship with father and number of friends that were statistically significant in univariate analyses
  3. b Model adjusted for gender, relationship with mother, relationship with father and number of friends
  4. c Model adjusted for gender and number of friends
  5. d Model adjusted for gender
  6. aOR Adjusted odds ratios, CI Confidence interval
  7. Variable levels significant at p < 0.05 are in boldface type