Table 2 The results of multiple regression analysis performed to investigate the relationship between factors and adolescent’s Internet addiction

Parents

 Mother’s depression

  Yes

0.0960

0.0325

0.0033

  No

Ref

–

–

 Father’s depression

  Yes

− 0.0107

0.0343

0.7555

  No

Ref

–

–

 Mother’s economic status

  Salary employee

0.0296

0.0156

0.0575

  Employer or self-employed

− 0.0090

0.0237

0.7054

  Not employed or unemployed

Ref

–

–

 Father’s economic status

  Salary employee

0.0041

0.0289

0.8865

  Employer or self-employed

− 0.0244

0.0303

0.4210

  Not employed or unemployed

Ref

–

–

 Mother’s education level

  High school or under

0.0380

0.0159

0.0173

  University or above

Ref

–

–

 Father’s education level

  High school or under

− 0.0203

0.0162

0.2132

  University or above

Ref

–

–

 Household income

  Low

− 0.0033

0.0213

0.8777

  Mid-low

− 0.0183

0.0190

0.3338

  Mid-high

− 0.0173

0.0180

0.3368

  High

Ref

–

–

Adolescents

 Gender

  Male

0.0815

0.0143

< 0.0001

  Female

Ref

–

–

 School type

  Elementary school

0.0178

0.0174

0.3046

  High school

Ref

–

–

 Academic performance

  Bad or very bad

0.0480

0.0219

0.0286

  Normal

0.0175

0.0159

0.2715

  Good or very good

Ref

–

–

 Academic achievement stress score

0.0053

0.0028

0.0624

 Depression and anxiety score

− 0.0002

0.0026

0.9341

 Attention problems score

0.0088

0.0030

0.0029

 Social problem score

0.0022

0.0041

0.5997

 Delinquency score

− 0.0072

0.0077

0.3484

 Aggression score

0.0127

0.0033

0.0001