Table 2.

Mixed effects regression model results for negative and positive affect Intensity (N=161)

	Negative affect				Positive affect
	Coef.	Std. Err.	95% Conf. Int.	p-value	Coef.	Std. Err.	95% Conf. Int.	p-value
Model 1
With friends	−0.071	0.029	(−0.128 – −0.014)	0.015	0.194	0.054	(0.088 – 0.300)	< 0.001
With rom. partner	-				0.109	0.051	(0.009 – 0.209)	0.033
Injected past 2 hours	0.063	0.028	(0.008 – 0.118)	0.025	−0.052	0.033	(−0.115 – 0.012)	0.112
High on opioids	-				0.143	0.045	(0.055 – 0.232)	0.002
Withdrawal	0.308	0.037	(0.235 – 0.382)	< 0.001	−0.271	0.046	(−0.362 – −0.180)	< 0.001
Female vs. Male	0.101	0.081	(−0.057 – 0.260)	0.211	−0.219	0.124	(−0.462 – 0.023)	0.076
Heterosexual	−0.259	0.130	(−0.513 – −0.004)	0.047	-
Age	0.024	0.008	(0.008 – 0.041)	0.004	−0.026	0.017	(−0.059 – 0.006)	0.112
Race/ethnicity (vs. NH White)
Hispanic	−0.068	0.077	(−0.219 – 0.083)	0.375	0.213	0.162	(−0.104 – 0.529)	0.188
Other (NH)	0.273	0.121	(0.037 – 0.510)	0.023	0.646	0.183	(0.287 – 1.005)	< 0.001
Drug treatment, 6 mo.	−0.036	0.075	(−0.182 – 0.110)	0.631	0.209	0.124	(−0.035 – 0.453)	0.093
Time of day (vs. Morning)
Afternoon	0.054	0.024	(0.007 – 0.100)	0.023	-
Evening/Night	0.084	0.027	(0.032 – 0.136)	0.002	-
BPD pos. screen	0.152	0.073	(0.009 – 0.296)	0.038	0.113	0.125	(−0.131 – 0.358)	0.365
Random intercepts (variance)
Subject	0.177	0.039	(0.115 – 0.272)		0.408	0.084	(0.272 – 0.612)
Day	0.082	0.017	(0.055 – 0.122)		0.154	0.031	(0.104 – 0.228)
Residual: Exponential
rho	0.233	0.085	(0.107 – 0.435)		0.288	0.051	(0.199 – 0.397)
var(e)	0.443	0.030	(0.388 – 0.505)		0.874	0.077	(0.736 – 1.039)
Model 2a
BPD pos. screen	0.084	0.069	(−0.051 – 0.218)	0.221	0.200	0.129	(−0.052 – 0.453)	0.120
DERS (standardized)	0.092	0.039	(0.017 – 0.168)	0.017	−0.118	0.057	(−0.230 – −0.007)	0.037

^aModel 2 included all the covariates from Model 1

NH: Non-Hispanic