Table 2 Results of the Meta-analyses Between Bullying Roles and NSSI.

From: A meta-analysis of the relationship between bullying and non-suicidal self-injury among children and adolescents

Role

No. of studies

No. of effect sizes

No. of adolescents

Odds ratio (95% CI)

Q

I2

Orwin’s fail-safe N

Victims

29

35

53,501

2.46 (2.14–2.83)

359.558

90.544

290

Bullies

10

12

14,253

2.12 (1.37–3.27)

152.03

92.76

89

Bully-Victims

6

7

8613

2.98 (1.85–4.82)

34.31

82.51

72

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