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Table 3 Multivariate Regression of Chronic Disease on Addiction Treatment Utilization (N = 498)

From: Chronic disease and recent addiction treatment utilization among alcohol and drug dependent adults

  Model 1 Model 2 Model 3
  Any Addiction Treatment Outpatient Days Residential Nights
Independent Variable AOR (95% CI) IRR (95% CI) IRR (95% CI)
Chronic disease (Katz)    
   None Referent Referent Referent
   One, of lower severity only 0.88 (0.60, 1.28) 0.86 (0.41, 1.81) 0.68 (0.31, 1.49)
   One of higher severity or multiple conditions 1.29 (0.89, 1.88) 1.14 (0.55, 2.38) 0.63 (0.23, 1.69)
Age 0.99 (0.98, 1.01) 1.00 (0.97, 1.04) 0.99 (0.96, 1.03)
Female 1.23 (0.89, 1.70) 1.74 (0.95, 3.20) 0.68 (0.31, 1.48)
Race    
   Black 0.57 (0.38, 0.85)** 0.47 (0.21, 1.05) 0.22 (0.08, 0.64)**
   Hispanic 0.77 (0.49, 1.20) 1.34 (0.62, 2.89) 0.55 (0.22, 1.36)
   Other 0.61 (0.32, 1.15) 0.75 (0.22, 2.57) 0.77 (0.27, 2.24)
   White Referent Referent Referent
Substance dependence    
   Alcohol dependent & recent heavy use 0.80 (0.52, 1.24) 0.78 (0.33, 1.83) 1.13 (0.50, 2.57)
   Drug dependent & recent use 0.86 (0.61, 1.22) 0.87 (0.39, 1.95) 0.48 (0.21, 1.11)
   Both Referent Referent Referent
Recruitment site    
   Detoxification program 0.82 (0.57, 1.17) 0.37 (0.19, 0.73)** 1.11 (0.48, 2.57)
   Other Referent Referent Referent
Criminal justice involvement (past 3 mo) 0.98 (0.73, 1.31) 1.26 (0.70, 2.27) 1.20 (0.66, 2.18)
Homeless (past 3 mo) 1.07 (0.80, 1.43) 0.95 (0.53, 1.72) 1.06 (0.58, 1.95)
Unemployed (past 3 mo) 1.07 (0.79, 1.45) 1.60 (0.79, 3.24) 0.85 (0.47, 1.54)
Health insurance 2.04 (1.24, 3.36)** 3.06 (0.88, 10.68) 2.54 (0.96, 6.71)
Current smoker 0.89 (0.61, 1.30) 0.79 (0.34, 1.81) 1.48 (0.53, 4.11)
Anxiety (Beck)    
   Low Referent Referent Referent
   Moderate 1.45 (0.99, 2.14) 1.71 (0.80, 3.66) 2.15 (0.97, 4.75)
   Severe 1.77 (1.23, 2.53)** 2.12 (1.02, 4.41)* 2.11 (0.94, 4.75)
  1. Model 1 used logistic regression; Models 2 and 3 used Poisson regression.
  2. *p < .05 **p < .01; Wald chi-square tests, df = 1