| 
      
        |  | Unstandardized coefficients | Standardized coefficients |  |  
        |  | Variables | Regression coefficient B | Standard error | Beta | t | sig. |  
        | step5 | CIUS | .339 | .021 | .291 | 15.890 | .000 |  
        |  | diff. in coping with study requ. | .692 | .117 | .397 | 23.000 | .000 |  
        |  | gender | 2.681 | .377 | .138 | 7.106 | .000 |  
        |  | online pornography | .447 | .208 | .043 | 2.152 | .031 |  
        |  | online gaming | -.333 | .149 | -.039 | -2.233 | .026 |  
        |  | online gambling | .785 | .370 | .036 | 2.123 | .034 |  
        |  | constant | -.646 | .957 |  | -.675 | .500 |  
        | variables of step 1: age, gender, time spend    online, chat, social communities, online gaming, online gambling, online    pornography, CIUS, difficulties in coping with study requirements.dependent    variable: depression |  |