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Table 4 Linear regression model on smart phone addiction at T4

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

Variables Block 1 Block 2 Block 3 Block 4
β t β t β t β t
Quarantine .10 1.37 .10 1.86 .08 1.74 .09 1.84
Lockdown .11 1.52 .06 1.22 .03 .66 .03 .57
Boredom .38 5.62*** .26 5.25*** .19 3.59*** .15 2.93**
Emotional loneliness .32 4.63*** .22 4.38*** .15 2.79** .12 2.28*
Social loneliness .01 .17 .02 .45 .01 .13 −.03 −.58
R2    .58 .60
Df    6/193 7/193
F    42.18*** 39.90***
  1. SPA Smart phone addiction; Block 1: simple regression analyses; Block 2: simple regression analyses adjusting for SPA at T3; Block 3: multiple regression analysis with multiple independent variables (all the COVID-related factors and the level of SPA at T3) being included; Block 4: multiple regression analysis with multiple independent variables (all the COVID-related factors, the level of SPA at T3 and depressive symptoms at T4) being included; *p < .05; **p < .01; ***p < .001