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. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: J Subst Abuse Treat. 2010 Mar;38(2):108. doi: 10.1016/j.jsat.2009.09.003

Table 2.

Predictors of employment using the domains approach: Incidence Rate Ratios and Confidence Intervals for independent domain and final cross-domain models for men

Model 1:
Demographics
Model 2:
Disability
Model 3:
Situational Barriers
Model 4:
Employment
Capital
Model 5:
Motivation
Model 6:
Final Model
(Effect Size)
IRR (95% CI) IRR (95% CI) IRR (95% CI) IRR (95% CI) IRR (95% CI) IRR (95% CI)
Time 1.03 (1.02, 1.03)*** 1.03 (1.03, 1.04)*** 1.03 (1.02, 1.03)*** 1.02 (1.01, 1.03)*** 1.02 (1.02, 1.03)*** 1.02 (1.01, 1.03)***
(d = .01)
Age in years .97 (.96, .99)** .98 (.97, 1.00) .97 (.96, .99)** .97 (.96, .99)*** .99 (.97, 1.00) .99 (.97, 1.01)
(NS)
Hispanic (AA) .93 (.74, 1.17) 1.07 (.82, 1.38) 1.06 (.83, 1.35) .85 (.66, 1.08) .83 (.66, 1.04) .79 (.61, 1.01)
(NS)
Other ethnicity
(AA)
1.78 (1.17, 2.71)** 2.06 (1.30, 3.27)** 2.05 (1.35, 3.12)** 1.56 (1.01, 2.39)* 1.63 (1.09, 2.45)* 1.55 (1.00, 2.40)
(NS)
Years education 1.06 (.99, 1.14) 1.07 (.99, 1.16) 1.06 (.99, 1.14) 1.03 (.97, 1.10) 1.03 (.96, 1.10) 1.02 (.95, 1.10)
(NS)
Time on welfare 1.05 (.92, 1.19) 1.05 (.91, 1.21) 1.04 (.91, 1.18) 1.07 (.94, 1.22) 1.13 (.99, 1.28) 1.16 (1.01, 1.32)
(NS)
Treatment
condition (CCM)
.84 (.67, 1.04) 1.10 (.86, 1.40) .84 (.67, 1.05) .84 (.66, 1.05) .90 (.73, 1.12) 1.11 (.88, 1.41)
(NS)
Alcohol usea 1.66 (.96, 2.87)
Drug useb .32 (.12, .86)* .67 (.28, 1.60)
(NS)
Prior treatment
episodes
.97 (.95, .99)** .99 (.97, 1.00)
(NS)
Mental health 1.00 (.99, 1.01)
Physical health 1.01 (1.00, 1.03)* 1.00 (.99, 1.02)
(NS)
In methadone
treatment (In drug-
free tx)
.76 (.56, 1.04)
Not in treatment (In
drug-free tx)
.99 (.76, 1.29)
Criminal justice
history (None)
1.13 (.91, 1.42)
Housing instability
(Stable)
1.48 (1.12, 1.94)** 1.26 (.93, 1.69)
(NS)
Employment capital
index
.96 (.79, 1.17)
Months employed
past 3 years
1.16 (1.06, 1.26)** 1.16 (1.06, 1.27)**
(d = .08)
Readiness to
abstain
1.05 (.98, 1.11)
Readiness to work 1.44 (1.33, 1.56)*** 1.41 (1.29, 1.54)***
(d = .19)
*

p < .05

**

p < .01

***

p < .001

Note. The reference group for each predictor (when applicable) is shown in parentheses.

a

Alcohol Composite Score from the Addiction Severity Index

b

Drug Composite Score from the Addiction Severity Index