Table 4 Multivariable analysis

Model 1: Linear regression taking the physical aggression score as the dependent variable (R ²  = 0.124).

Loneliness

0.01

0.15

0.001

0.001; 0.01

Perceived social competence

− 0.004

− 0.09

0.063

− 0.01; 0.001

Psychological distress

0.003

0.11

0.055

− 0.001; 0.01

Exposure to media violence

0.004

0.21

< 0.001

0.002; 0.01

Body Mass Index

0.001

0.07

0.121

− 0.001; 0.002

Physical activity

0.001

0.09

0.050

− 0.001; 0.002

Model 2: Linear regression taking the verbal aggression score as the dependent variable (R² = 0.148).

Loneliness

0.09

0.19

0.001

0.04; 0.15

Perceived social competence

− 0.06

− 0.12

0.014

− 0.11; − 0.01

Psychological distress

0.06

0.15

0.010

0.01; 0.10

Exposure to media violence

0.04

0.16

0.001

0.02; 0.06

Body Mass Index

0.01

0.09

0.060

− 0.001; 0.03

Model 3: Linear regression taking the hostility score as the dependent variable (R² = 0.312).

Loneliness

0.05

0.08

0.111

− 0.01; 0.11

Perceived social competence

− 0.04

− 0.06

0.132

− 0.10; 0.01

Psychological distress

0.20

0.42

< 0.001

0.15; 0.25

Exposure to media violence

0.06

0.21

< 0.001

0.04; 0.09

Body Mass Index

0.02

0.11

0.012

0.01; 0.04

Age

− 0.02

− 0.06

0.152

− 0.05; 0.01

Model 4: Linear regression taking the anger score as the dependent variable (R² = 0.418).

Loneliness

0.16

0.26

< 0.001

0.10; 0.22

Perceived social competence

− 0.07

− 0.11

0.006

− 0.13; − 0.02

Psychological distress

0.19

0.38

< 0.001

0.14; 0.23

Exposure to media violence

0.06

0.22

< 0.001

0.04; 0.09

Age

0.001

0.003

0.933

− 0.03; 0.03