Table 3: Hierarchical regression model for mobile phone use addiction (PMPUQ dependence) scores

- R2 ΔR2 B Lower bound Upper bound β
Step 1 0.01 0.01 - - - -
Age - - 0.08 -0.10 0.25 0.04
Gender - - -0.43 -0.98 0.12 -0.70
Step 2 0.05 0.04 - - - -
Age - - 0.01 0.16 0.18 0.01
Gender - - -0.38 -0.97 0.22 -0.06
Hours per day spent on MP - - 0.20** 0.08 0.32 0.18
Hours per day spent on MP-SN - - 0.06 -0.07 0.19 0.05
Hours per day spent on MP-VG - - -0.02 -0.18 0.13 -0.01
Step 3 0.07 0.02 - - - -
Age - - 0.00 -0.17 0.17 0.00
Gender - - -0.30 -0.89 0.29 0.05
Hours per day spent on MP - - 0.20** 0.08 0.31 0.18
Hours per day spent on MP-SN - - 0.04 -0.09 0.17 0.03
Hours per day spent on MP-VG - - -0.05 -0.21 0.11 -0.03
RF - - -0.06** -0.10 -0.02 -0.14
Step 4 0.10 0.03 - - - -
Age - - 0.02 -0.15 0.19 0.01
Gender - - -0.38 0.07 0.30 -0.06
Hours per day spent on MP - - 0.19** 0.07 0.30 0.17
Hours per day spent on MP-SN - - 0.05 -0.08 0.18 0.04
Hours per day spent on MP-VG - - -0.05 -0.21 0.10 -0.03
RF - - -0.06** -0.09 -0.02 -0.13
CTQ-total score - - 0.04*** 0.02 0.06 0.17
Step 5 0.10 0.00 - - - -
Age - - 0.02 -0.15 0.18 0.01
Gender - - -0.36 -0.95 0.22 -0.06
Hours per day spent on MP - - 0.18** 0.06 0.30 0.17
Hours per day spent on MP-SN - - 0.05 -0.08 0.18 0.04
Hours per day spent on MP-VG - - -0.06 -0.21 0.10 -0.03
RF - - -0.08 -0.20 0.04 -0.18
CTQ-total score - - 0.08* 0.02 0.13 0.34
RF x gender - - 0.01 -0.06 0.09 0.04
CTQ-total score x gender - - -0.03 -0.07 0.01 -0.17

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