Table 2.

Multinomial regression of factors associated with attrition from treatment due to incarceration and other reasons compared to treatment completion or transferred to another facility.

	Model 1				Model 2
	Incarceration vs. completion		Other reasons vs. completion		Incarceration vs. other reasons
	RRR	p-value	RRR	p-value	RRR	p-value
Demographic characteristic
Age (less than 30)
18–24	1.28 (1.09, 1.50)^**	.002	.84 (.76, .92)^***	<.001	1.53 (1.33, 1.75)^***	<.001
25–29	1.61 (1.39, 1.85)^***	<.001	.96 (.88, 1.05)	.360	1.67 (1.48, 1.89)^***	<.001
30–49	1.63 (1.45, 1.84)^***	<.001	1.02 (.95, 1.09)	.638	1.60 (1.45, 1.78)^***	<.001
Sex	.54 (.50, .59)^***	<.001	.93 (.88,.97)	.002	.58 (.54, .63)^***	<.001
Race
Black	1.73 (1.50, 1.98)^***	<.001	1.54 (1.40, 1.69)^***	<.001	1.12 (1.00, 1.25)^*	.042
Native American	1.57 (1.19, 2.08)^**	.003	1.38 (1.13, 1.69)^***	<.001	1.14 (.91, 1.42)	.247
Asian	.79 (.45, 1.39)	.413	1.07 (.79, 1.44)	.715	.74 (.45, 1.23)	.247
Other race/>1 race	1.23 (1.05, 1.44)^**	.009	1.16 (1.04, 1.29)^**	.008	1.06 (.93, 1.21)	.342
Ethnicity
Latinx	1.39 (1.21, 1.61)^***	<.001	1.27 (1.16, 1.39)^***	<.001	1.10 (.97, 1.23)	.128
Socioeconomic factors
Education
Less than high school education	1.57 (1.41, 1.75)^***	<.001	1.42 (1.33, 1.53)^***	<.001	1.10 (1.01, 1.21)^*	.022
High school diploma	1.29 (1.17, 1.42)^***	<.001	1.17 (1.10, 1.24)^***	<.001	1.10 (1.01, 1.20)^*	.036
Unemployed	1.36 (1.26, 1.48)	<.001	1.10 (1.04, 1.16)^**	<.001	1.24 (1.16, 1.33)^***	<.001
Living arrangements
Homeless	1.55 (1.33, 1.80)^***	<.001	1.30 (1.17, 1.45)^***	<.001	1.18 (1.06, 1.32)^**	.003
Dependent living	1.01 (.90, 1.12)	.918	.74 (.68, .79)^***	<.001	1.36 (1.24, 1.50)^***	<.001
Criminal justice involvement
One	2.15 (1.84, 2.52)^***	<.001	1.09 (.96, 1.23)	.170	1.98 (1.77, 2.22)^***	<.001
>1	1.20 (.85 1.71)	.299	.70 (.54, .91)^***	.007	1.73 (1.27, 2.33)^***	<.001
Source of referral
Individual	1.76 (1.56, 1.97)^***	<.001	1.47 (1.38, 1.58)^***	<.001	1.19 (1.08, 1.32)^***	<.001
Other	1.08 (.89, 1.29)	.422	.83 (.74,.92)^**	<.001	1.30 (1.11, 1.52)^***	<.001
Court/Criminal justice referral	1.48 (1.27, 1.72)^***	<.001	.45 (.41, .50)^***	<.001	3.27 (2.87, 3.73)^***	<.001
Substance abuse treatment
Length of treatment
<30 days	1.68 (1.48, 1.92)^***	<.001	3.37 (3.10, 3.66)^***	<.001	.50 (.45, .56)^***	<.001
30–90 days	1.81 (1.61, 2.04)^***	<.001	2.39 (2.22, 2.28)^***	<.001	.76 (.69, .84)^***	<.001
90–180 days	1.34 (1.19,. 1.51)	.173	1.39 (1.30, 1.50)^***	<.001	.96 (.87, 1.06)	.456
180–364 days	1.21 (1.08, 1.53)^*	.002	1.16 (1.08, 1.25)^***	<.001	1.04 (.94, .1.15)	.431
Prior treatment history
>1 prior treatment episodes	1.42 (1.29, 1.57)^***	<.001	1.09 (1.02, 1.14)^*	.006	1.31 (1.20, 143)^***	<.001
Substance use
Substance use at admission
Heroin	2.09 (1.77, 2.46)^***	<.001	1.51 (1.37, 1.67)^***	<.001	1.38 (1.19, 1.60)^***	<.001
Methadone (non-prescription)	1.47 (1.12, 1.93)^**	.005	1.17 (.99, 1.36)	.053	1.26 (.99, 1.61)	.063
Synthetic and other opiates	1.23 (1.07, 1.53)^**	.004	1.28 (1.17, 1.39)^***	<.001	.98 (.86, 1.10)	.685
Cocaine	1.55 (1.35, 1.77)^***	<.001	1.30 (1.19, 1.42)^***	<.001	1.19 (1.06, 1.34)^**	.003
Methamphetamines	2.04 (1.68, 2.47)^***	<.001	1.51 (1.37, 1.66)^***	<.001	1.34 (1.14, 1.58)	<.001
Benzodiazepines	1.28 (1.07,1.53)^**	.006	1.10 (.98, 1.23)	.094	1.17 (1.01, 1.36)^*	.046
Cannabis	1.27 (1.10, 1.45)^***	<.001	1.18 (1.08, 1.25)^***	<001	1.07 (.95, 1.20)	.266
Daily drug use at admission	1.59 (1.41, 1.74)^***	<.001	1.63 (1.53, 1.72)^***	<.001	.97 (.90, 1.04)	.215
Number of substances at admission
2	.78 (.69, .89)^***	<.001	.84 (.78, .91)^***	<.001	.93 (.83, 1.04)	.431
3	.55 (.45, .68)^***	<.001	.70 (.62, .79)^***	<.001	.79 (.66, .95)^*	.012
Current IV drug use	1.27 (1.16, 1.39)^***	<.001	1.05 (.99, 1.12)	.092	1.21 (1.12, 1.30)^***	<.001
Comorbid psychiatric condition	1.09 (.99, 1.18)^*	.093	1.09 (1.03, 1.16)^***	<.001	.99 (.91, 1.06)	.723

p < .05,

^**

p < .01,

^***

p < .001.