Table 4: Hierarchical regression model for mobile phone use addiction (PMPUQ dependence) scores

- R2 ΔR2 B Lower bound Upper bound β
Males (N = 258) - - - - - -
Step 1 0.07 0.07 - - - -
Age - - 0.0 -0.22 0.23 0.00
Hours per day spent on MP - - 0.21*** 0.06 0.36 0.21
    Hours per day spent on MP-SN - - 0.05 -0.13 0.22 0.04
    Hours per day spent on MP-VG - - 0.11 0.08 0.30 0.08
Step 2 0.08 0.01 - - -
    Age - - 0.00 -0.23 0.22 0.00
    Hours per day spent on MP - - 0.20** 0.05 0.35 0.19
    Hours per day spent on MP-SN - - 0.03 -0.14 0.21 0.03
    Hours per day spent on MP-VG - - 0.08 -0.11 0.28 0.06
    RF - - -0.05 -0.10 0.00 -0.12
Step 3 0.14 0.06 - - -
    Age - - 0.01 -0.21 -0.23 0.00
    Hours per day spent on MP - - 0.17* 0.03 0.32 0.17
    Hours per day spent on MP-SN - - 0.05 -0.13 0.24 0.04
    Hours per day spent on MP-VG - - 0.08 -0.10 0.27 0.06
    RF - - -0.06* -0.11 -0.01 -0.14
    CTQ-total score - - 0.05*** 0.02 0.07 0.24
Females (N = 230) - - - - -
Step 1 0.06 0.06 - - -
    Age - - 0.13 -0.22 -0.30 0.19
    Hours per day spent on MP - - 0.16 -0.03 -0.04 0.36
    Hours per day spent on MP-SN - - 0.08 -0.14 0.29 0.07
    Hours per day spent on MP-VG - - -0.46** -0.80 -0.14 -0.19
Step 2 0.08 0.02 - - -
    Age - - 0.03 -0.23 0.29 0.02
    Hours per day spent on MP - - 0.18 - 0.02 0.38 0.16
    Hours per day spent on MP-SN - - 0.05 -0.16 0.26 0.04
    Hours per day spent on MP-VG - - -0.47** -0.78 -0.15 -0.19
    RF - - -0.06* -0.12 -0.05 -0.14
Step 3 0.09 0.01 - - -
    Age - - 0.05 -0.21 0.31 0.02
    Hours per day spent on MP - - 0.18 - 0.02 0.34 0.16
    Hours per day spent on MP-SN - - 0.05 -0.16 0.26 0.04
    Hours per day spent on MP-VG - - -0.48** -0.79 -0.16 -0.19
    RF - - -0.05 -0.11 -0.01 -0.12
    CTQ-total score - - 0.02 -0.01 0.06 0.09

Note: Hours per day spent on MP: Hours per day spent on mobile phone; Hours per day spent on MP-SN: Hours per day spent on mobile phone for social networking purposes; Hours per day spent on MP-VG: Hours per day spent on mobile phone for video gaming purposes; PMPUQ dependence: mobile phone use addiction; RF: Reflective Functioning; CTQ-total score: Childhood Trauma Questionnaire.
*p < .05; **p < .01; *** p < .001