. 2018 May 8;13(5):e0195364. doi: 10.1371/journal.pone.0195364

Table 4. The relationship between the demographic variables and the likelihood of having at least one close friend with high-risk behaviors (n = 801).

Variable		Tramadol Use				Alcohol Consumption				Opium Use				Cannabis Use				Extramarital Heterosexual Intercourse				Heterosexual Intercourse in Return
Variable		Crude OR	P-value	Adjusted OR	P-value	Crude OR	P-value	Adjusted OR	P-value	Crude OR	P-value	Adjusted OR	P-value	Crude OR	P-value	Adjusted OR	P-value	Crude OR	P-value	Adjusted OR	P-value	Crude OR	P-value	Adjusted OR	P-value
Age	<25	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	20–24	2.11	<0.05	1.48	0.19	1.35	0.074	1.46	<0.05	0.065	0.37	0.57	0.25	2.36	0.05	2.94	<0.05	1.75	<0.01	1.40	0.05	0.46	<0.001	0.88	0.62
	>25	1.88	0.06	1.54	0.33	1.36	0.13	1.48	0.15	0.67	0.51	0.52	0.42	2.0	0.18	3.18	0.05	2.14	<0.001	1.93	<0.05	0.51	<0.05	0.85	0.75
Gender	Male	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Gender	Female	0.13	<0.001	0.15	<0.001	1.15	0.37	1.19	<0.02	1.63	0.25	1.81	0.19	0.97	0.92	0.98	0.94	0.42	<0.001	0.45	<0.001	25.6	<0.001	23.7	<0.001
Marital Status	Single	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Marital Status	Married	0.39	0.11	0.30	0.08	0.52	<0.05	0.46	<0.05	1.0	0.99	1.0	0.99	0.64	0.54	0.52	0.42	0.64	0.11	0.50	<0.05	0.66	0.31	0.61	0.35
Type of Residence	Dormitory	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Family Home	0.63	0.06	0.76	0.3	1.40	<0.05	1.40	<0.05	0.39	0.06	0.47	0.16	1.69	0.11	1.56	0.21	0.84	0.23	1.06	0.73	3.63	<0.001	3.07	<0.001
	Separate Home	0.88	0.90	0.89	0.9	2.29	0.22	1.60	0.492	1.0	0.99	1.0	0.99	1.0	0.99	1.0	0.99	1.47	0.57	1.74	0.43	2.89	0.19	1.69	0.59
	Shared Home	6.36	<0.001	4.25	<0.05	9.75	<0.001	7.06	<0.01	1.0	0.99	1.0	0.99	1.0	0.99	1.0	0.99	4.41	<0.01	3.59	<0.05	1.19	0.82	2.0	0.45
Academic Degree	Bachelor's	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	Master's	0.83	0.57	0.62	0.24	1.64	<0.05	1.52	0.09	1.31	0.59	2.02	0.28	1.56	0.39	1.27	0.68	1.59	<0.05	1.21	0.45	1.61	0.09	2.24	<0.05
	General Practice	1.17	0.53	1.20	0.51	2.03	<0.001	1.78	<0.01	0.30	0.06	0.35	0.11	2.85	<0.01	2.99	<0.01	0.95	0.77	0.91	0.58	2.55	<0.001	2.17	<0.01
	PhD	1.43	0.45	1.49	0.56	1.0	0.99	1.03	0.95	1.0	0.99	1.0	0.99	0.821	0.85	0.73	0.79	1.06	0.86	0.75	0.53	0.41	0.235	0.87	0.83