Table 4 Regression analysis of the relationship between variables in the chained mediation model with adjustment

Social anxiety

Peer victimization

0.328

0.157

<0.001

[0.297, 0.359]

Stay behind or not

1.238

0.146

<0.001

[0.952, 1.524]

Marital status of parents

0.361

0.178

0.043

[0.012, 0.710]

Grade

-0.487

0.0919

<0.001

[-0.667, -0.307]

Smart phone addiction

Peer victimization

0.723

0.020

<0.001

[0.683, 0.763]

Social anxiety

0.551

0.107

<0.001

[0.530, 0.572]

Stay behind or not

1.409

0.186

<0.001

[1.045, 1.774]

Marital status of parents

1.069

0.226

<0.001

[0.626, 1.513]

Grade

-0.378

0.117

0.001

[-0.607, -1.489]

NSSI

Peer victimization

0.367

0.113

<0.001

[0.345, 0.389]

Social anxiety

0.369

0.006

<0.001

[0.0245, 0.049]

Mobile phone addiction

0.061

0.005

<0.001

[0.053, 0.070]

Sex

0.603

0.096

<0.001

[0.450, 0.792]

Ln1: Peer victimization × Sex

0.114

0.023

<0.001

[0.070, 0.168]

Ln2: Social anxiety × Sex

0.004

0.013

0.732

[-0.203, 0.029]

Ln3: mobile phone addiction × Sex

0.025

0.009

0.0067

[0.007, 0.042]

Stay behind or not

0.105

0.099

0.291

[-0.089, 0.299]

Marital status of parents

0.041

0.120

0.7362

[-0.195, 0.277]

Grade

-0.305

0.062

<0.001

[-0.427, -0.183]