Table 2 The Impact of Internet Use Frequency on the Prevalence of NSSI Behavior Among adolescents by Gender

Independent Variable: Internet use frequency

IM softwares

0.054

0.985

0.912

1.024

Social softwares

0.786*

1.012**

0.993***

1.025***

Video softwares

1.034

1.055

0.972

0.860

Shopping softwares

0.985

−0.900

1.139

1.016

Knowledge sharing softwares

−1.091**

− 1.097***

0.994

0.984

Online gaming

0.927

1.840

1.307

0.950

Control variables

Age

1.030

−0.886

Only-child (reference: No)

−0.746**

−1.117*

Father’s educational level (reference:primary school and below) middle school or above

−0.793

−1.125

Mother’s educational level (reference:primary school and below) middle school or above

−1.279

−1.089

Parents’ marital status (reference:separated) Married

−0.762***

−0.969**

95% CI

0.73, 0.86**

0.84, 1.05**

1.22, 0.94**

1.30,1.10**

−2 Log Likelihood

607.07**

591.36***

787.32***

845.21***

Cox & Snell R²

0.003

0.023

0.002

0.025

Nagelkerke R²

0.005

0.037

0.004

0.040