Table 1.

Percentages and bridge centrality of alcohol and cannabis use disorder symptoms.

Label	Items	Baseline (n = 1559)				Follow-up (n = 991)
		%	Bridge Strength	Bridge Betweenness	Bridge Closeness	%	Bridge Strength	Bridge Betweenness	Bridge Closeness
A1	Neglect important activities	20.9	0.60	8	0.23	19.5	0.33	5	0.24
A2	Increased chances of getting injured	45.4	0.00	0	0.18	46.6	0.00	0	0.13
A3	Resume drinking habits despites problems with others	8.1	0.50	11	0.28	6.5	0.00	0	0.27
A4	Tolerance	34.2	0.07	0	0.19	27.4	0.00	0	0.22
A5	Withdrawal	6.9	2.09	69	0.40	4.7	0.00	0	0.16
A6	Drink more/longer than intended	43.0	0.28	0	0.18	51.2	0.00	0	0.17
A7	Try to cut down but couldn’t	5.8	0.00	9	0.25	5.5	0.63	54	0.35
A8	Spend time obtaining, using, recovering from alcohol	26.6	0.12	2	0.19	27.0	0.00	4	0.18
A9	Give up activities	5.0	0.00	14	0.26	4.5	0.37	17	0.25
A10	Continue drinking despites health problems	5.4	0.72	3	0.22	3.8	0.00	18	0.20
A11	Strong desire or urge to drink	6.0	0.00	0	0.24	6.0	0.00	0	0.15
C1	Frequency of cannabis use previous 12 months	48.6	1.11	0	0.24	100 *	-	-	-
C2	Felt stoned after using cannabis ≥3 h	37.4	0.00	0	0.21	47.4	0.00	0	0.16
C3	Felt stoned for ≥6 h	46.3	0.00	11	0.24	52.3	0.00	11	0.18
C4	Being not able to stop using cannabis	20.3	0.00	13	0.24	18.9	0.00	0	0.22
C5	Failed to do what is expected	36.0	0.43	3	0.21	35.2	0.33	17	0.25
C6	Need of cannabis in the morning after a heavy cannabis intake	16.6	1.36	64	0.31	12.9	0.00	18	0.22
C7	Felt guilty or remorseful	29.3	0.00	0	0.20	27.6	0.00	0	0.18
C8	Had a problem with memory/concentration	39.3	0.51	2	0.22	36.8	0.00	0	0.21
C9	Refrained from leisure activities	18.4	0.47	0	0.20	18.9	0.00	0	0.18
C10	Had difficulties at work/school	12.4	0.50	4	0.23	8.8	1.00	78	0.31

A: alcohol, C: cannabis. * This symptom was not included in the network analysis because it has no variance (symptom endorsed by all participants).