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Table 3 Correlations among COVID-related factors, smart phone addiction and depressive symptoms at T4

From: A longitudinal study of changes in smart phone addiction and depressive symptoms and potential risk factors among Chinese college students

  1 2 3 4 5 6 7
1 Quarantine 1       
2 Lockdown .01 1      
3 Boredom .11 .15* 1     
4 Emotional loneliness −.03 .01 .39*** 1    
5 Social loneliness −.03 .05 −.00 .13 1   
6 SPA .11 .10 .38*** .32*** .01 1  
7 DS .01 .09 .31*** .29*** .20** .44*** 1
  1. Spearman/Pearson’s correlation analyses; Quarantine and lockdown were dummy coded in the analyses; SPA Smart phone addiction, DS Depressive symptoms; *p < .05; **p < .01; ***p < .001