Table 3. Predictors of FB problematic use: Hierarchical regressions.

	Model 1				Model 2
	Estimate	SE1	t	p-Value2	Estimate	SE	t	p-Value2
Women vs. Men	-0.039	0.024	-1.66	0.10	-0.023	0.023	-1.01	0.31
Age	-0.003	0.001	-3.29	>0.01	-0.003	0.001	-2.82	>0.01
FB activities (yes vs. no):
Updating status	0.090	0.024	3.76	>0.001	0.090	0.022	4.03	>0.001
Reading the news feed	0.035	0.022	1.58	0.11	0.018	0.021	0.87	0.39
Reading friends’ timelines	0.012	0.022	0.57	0.57	0.002	0.020	0.09	0.92
Commenting	-0.019	0.024	-0.81	0.42	-0.030	0.022	-1.37	0.17
Viewing friends’ pictures	0.014	0.022	0.63	0.53	0.009	0.021	0.44	0.66
Gaming	0.096	0.036	2.68	>0.01	0.079	0.034	2.34	0.02
Contributing to a group	0.040	0.023	1.77	0.08	0.034	0.021	1.64	0.10
Sharing stuff from the Internet	-0.013	0.042	-0.30	0.77	-0.025	0.040	-0.63	0.53
Messenger app (yes vs. no)	0.014	0.023	0.61	0.54	0.010	0.022	0.48	0.63
FB main access (vs. personal computer):
Professional computer	-0.037	0.043	-0.85	0.40	-0.052	0.041	-1.27	0.20
Smartphone	-0.039	0.024	-1.59	0.11	-0.044	0.023	-1.93	0.05
Tablet	-0.070	0.048	-1.48	0.14	-0.072	0.044	-1.63	0.10
Notifications (yes vs. no)	0.049	0.023	2.15	0.03	0.039	0.021	1.85	0.06
Impulsivity traits:
Negative urgency					0.009	0.005	2.03	0.04
Positive urgency					0.022	0.005	4.15	>0.001
Lack of premeditation					-0.006	0.005	-1.07	0.29
Lack of perseverance					0.032	0.005	6.53	>0.001
Sensation seeking					0.001	0.004	0.37	0.72
R2	0.075				0.206
Delta R2					0.130			>0.001

¹Standard error of the regression coefficient.

²p-Values smaller than 0.05 are in bold.