Table 1:

Cox Regression Model for Time to Opioid Dependence using Sociodemographics and Age of Opioid Initiation (n = 118)

Characteristic	B	SE	t-value	p-value	HRs	95% CIs
Age of Opioid Initiation	0.047	0.003	16.94	< 0.001	1.05	1.04–1.06
Young Adults (18–25)	***Reference Group***
Ages 26–35	−0.014	0.103	−0.14	0.90	0.99	0.74–1.31
Ages 36–50	−0.758	0.012	−4.4	0.011	0.47	0.29–0.76
Ages 51 and older	−0.671	0.127	−5.27	0.006	0.51	0.36–0.73
Male	***Reference Group***
Female	−0.304	0.057	−5.32	0.006	0.74	0.63–0.86
Caucasian	***Reference Group***
Hispanic/Latino	−0.975	0.120	−8.12	0.001	0.38	0.27–0.53
Native American	−0.755	0.108	−7.03	0.002	0.47	0.35–0.63
Asian-American	0.454	0.106	4.27	0.013	1.58	1.17–2.12
African-American	−0.096	0.067	−1.43	0.22	0.91	0.75–1.09
Multiracial	1.146	0.190	6.02	0.004	3.15	1.85–5.33
Married	***Reference Group***
Co-Habitating	0.416	0.029	14.29	0.0001	1.52	1.40–1.64
Widowed	0.859	0.154	5.57	0.005	2.36	1.54–3.63
Divorced	−0.142	0.064	−2.21	0.09	0.87	0.73–1.04
Separated	0.515	0.119	4.32	0.013	1.67	1.20–2.33
Never Married	−0.243	0.077	−3.14	0.035	0.78	0.63–0.97
HS Graduate	***Reference Group***
HS Dropout	−0.162	0.068	−2.39	0.08	0.85	0.70–1.03
Some College	0.300	0.120	2.50	0.07	1.35	0.97–1.89
College Graduate	−0.045	0.105	−0.43	0.69	0.96	0.71–1.28
Postgraduate Work	−0.121	0.522	−0.23	0.28	0.83	0.21–3.77
Less than 40,000 USD	***Reference Group***
40,000–69,999 USD	0.174	0.106	1.65	0.18	1.19	0.89–1.60
70,000–99,999 USD	−0.362	0.322	−1.12	0.32	0.70	0.29–1.70
100,000–149,999 USD	0.175	0.062	2.82	0.048	1.19	1.00–1.42
150,000 or more USD	1.549	0.161	9.64	0.0006	4.71	3.01–7.35
Currently Employed	−0.304	0.072	−4.22	0.014	0.74	0.60–0.90
Current Student	0.125	0.180	0.69	0.53	1.13	0.69–1.87
Northeastern US	***Reference Group***
Midwest	−0.291	0.064	−4.57	0.01	0.75	0.63–0.89
Southern US	0.283	0.096	2.94	0.042	1.33	1.02–1.73
Western US	0.032	0.072	0.44	0.68	1.03	0.85–1.26