Table 3:

Cox Regression Model for Time to Opioid Dependence using Sociodemographics, Never Drug Use and Ages of Alcohol Use, Other Drug Use and Nonmedical Opioid Use Initiation (n = 118)

Characteristic	B	SE	t−value	p−value	HRs	95% CIs
Age of Opioid Initiation	0.047	0.003	15.89	<.0001	1.05	1.04–1.06
Age of Alcohol Initiation	−0.012	0.009	−1.41	0.23	0.99	0.96–1.01
Age of Other Drug Initiation	0.029	0.016	1.83	0.14	1.03	0.99–1.08
Never Other Drug Use	−0.794	0.06	−14.17	0.0001	0.45	0.39–0.53
Ages 18–25	***Reference Group***
Ages 26–35	−0.074	0.11	−0.65	0.55	0.93	0.68–1.27
Ages 36–50	−0.788	0.19	−4.21	0.014	0.46	0.27–0.76
Ages 51 and older	−0.770	0.12	−6.3	0.003	0.46	0.33–0.65
Males	***Reference Group***
Female	−0.186	0.06	−3.27	0.03	0.83	0.71–0.97
Caucasian	***Reference Group***
Hispanic/Latino	−0.619	0.14	−4.55	0.01	0.54	0.37–0.79
Native American	−0.771	0.10	−7.55	0.002	0.46	0.35–0.61
Asian-American	0.432	0.15	2.88	0.045	1.54	1.02–2.33
African-American	−0.006	0.07	−0.08	0.94	0.99	0.83–1.20
Multiracial	1.044	0.19	5.55	0.005	2.84	1.69–4.79
Married	***Reference Group***
Co-Habitating	0.338	0.04	9.36	0.0007	1.40	1.27–1.55
Widowed	1.427	0.19	7.63	0.002	4.17	2.48–7.01
Divorced	−0.256	0.07	−3.63	0.02	0.77	0.64–0.94
Separated	0.742	0.11	6.71	0.003	2.10	1.55–2.85
Never Married	−0.294	0.07	−4.03	0.02	0.75	0.61–0.91
HS Graduate	***Reference Group***
HS Dropout	−0.133	0.09	−1.43	0.23	0.88	0.68–1.13
Some College	0.323	0.13	2.5	0.07	1.38	0.97–1.98
College Graduate	−0.123	0.15	−0.84	0.45	0.88	0.59–1.33
Postgraduate Work	0.195	0.50	0.39	0.72	1.22	0.30–4.86
Less than 40,000 USD	***Reference Group***
40,000–69,999 USD	0.207	0.13	1.59	0.19	1.23	0.86–1.76
70,000–99,999 USD	−0.418	0.33	−1.25	0.28	0.66	0.26–1.67
100,000–149,999 USD	0.191	0.07	2.83	0.047	1.21	1.00–1.46
150,000 or more USD	1.393	0.14	9.86	0.0006	4.03	2.72–5.96
Currently Employed	−0.303	0.09	−3.21	0.033	0.74	0.57–0.96
Current Student	−0.010	0.20	−0.05	0.96	0.99	0.57–1.72
Northeastern US	***Reference Group***
Midwest	−0.291	0.08	−3.45	0.03	0.75	0.59–0.95
Southern US	0.299	0.08	3.84	0.02	1.35	1.09–1.67
Western US	0.055	0.07	0.81	0.46	1.06	0.88–1.28