Variables

SE Wald df p OR CI (95%)

Age

0.03 0.04 1 0.84 0.99 0.94-1.05

Marital status

           

Married
Single
Separated/Widowed (reference)

0.72
0.69  
0.16
0.23  
1
1  
0.69
0.63  
1.33
1.39  
0.33-5.46
0.36-5.37  

Race

           

White
Non-white (reference)

0.41   2.73   1   0.10   1.97   0.88-4.41  

Educational level

           

1-8th
9-11th
≥ 12th (reference)

0.64
0.50
6.68
0.01
1
1
0.01*
0.94
0.19
0.94
0.06-0.67
0.36-2.57

Money spent on crack/cocaine use in the past 30 days

<0.01

0.01

1

0.93

>0.99 0.99-1.01

Monthly income

<0.01 1.32 1 0.25 >0.99 0.99-1.01

Number of days cocaine used in the last 30

0.02 0.19 1 0.66 1.01 0.96-1.06

Days of cocaine used per week

0.12 0.38 1 0.53 1.07 0.86-1.35

Grams of cocaine used in the last 30 days

0.01 0.64 1 0.42 1.01 0.99-1.03

Age of first cocaine use

0.03 1.25 1 0.26 0.96 0.90-1.03

Years of cocaine use

0.03 0.72 1 0.40 1.03 0.96-1.10

Route of administration

           

Intranasal
Freebase (reference)
Both

0.46
0.59
0.73
1.55

1
1

0.39
0.21
0.67
2.09
0.27-1.67
0.66-6.65

Previous treatment for cocaine addiction

0.42 0.10 1 0.75 1.14 0.51-2.58

Live with other crack/cocaine users

0.61 0.15 1 0.70 1.27 0.38-4.19

Family history of cocaine dependence
First-degree parents

  0.48   0.88   1   0.35   1.57   0.61-4.04

Second degree parents
None (reference)

0.51 2.11 1 0.15 2.10 0.77-5.69

Involvement with criminal justice

0.46 0.34 1 0.56 0.76 0.31-1.89

Number of sexual partners in the last 6 months

0.05 0.98 1 0.32 0.96 0.87-1.05

Alcohol use
<50 units/week ≥ 50 units/week (reference)


0.44

0.46

1


0.50


1.35

0.57-3.22

Number of days alcohol used in the last 30

0.02 1.32 1 0.25 0.98 0.95-1.01

Years of regular alcohol use

0.05 0.03 1 0.85 1.01 0.91-1.12

Cigarette smokers

0.42 0.39 1 0.53 0.77 0.33-1.76

Cannabis smokers

0.65 2.91 1 0.09 3.01 0.85-10.83

Years of regular cannabis usea

0.04 <0.01 1 0.96 0.96 0.92-1.09

Crack/cocaine craving intensity during the past week b

0.08 <0.01 1 0.96 0.99 0.86-1.16

Crack/cocaine craving frequency during the past week b

           

Less than 3 times/day
More than 3 times/day (reference)

0.411   0.19   1   0.66   0.84   0.37-1.88  

Crack/cocaine craving duration during the last weekb

         

Less than 10 minutes
More than 10 minutes (reference)

0.41 0.80 1 0.37 1.44 0.65-3.19

ASI subscales

           

Drug

0.02 <0.01 1 0.95 0.99 0.97-1.03

Family/Child

0.12 2.33 1 0.13 1.19 0.95-1.50
Alcohol 0.02 0.02 1 0.91 1.01 0.97-1.04
Psychiatric 0.02 0.12 1 0.72 1.01 0.96-1.05
Medical 0.03 0.03 1 0.86 1.01 0.95-1.06
Legal 0.02 0.04 1 0.84 0.98 0.95-1.04
Employment 0.03 4.75 1 0.03* 1.08 1.01-1.15
Family/Social Support 0.01 <0.01 1 0.98 > 0.99 0.98-1.02
Family/Social Problem 0.02 <0.01 1 0.95 1.01 0.97-1.03
TCI subscales            
NS 0.06 0.13 1 0.72 0.98 0.88-1.09
HA 0.04 0.46 1 0.50 0.97 0.89-1.06
RD 0.06 0.01 1 0.91 0.99 0.88-1.12
P 0.13 0.98 1 0.32 0.88 0.68-1.13
SD 0.03 0.20 1 0.65 0.99 0.93-1.05
C 0.03 0.84 1 0.36 0.97 0.91-1.03
ST 0.03 0.04 1 0.83 1.01 0.94-1.08
BIS 0.02 1.97 1 0.16 1.03 0.99-1.07
* p < 0.05; ** p < 0.01
aComputed only for those that admitted to using cannabis
bMeasured by the MCCS (Minnesota Cocaine Craving Scale)
NS: Novelty Seeking; HA: Harm Avoidance; RD: Reward Dependence;
P: Persistence; SD: Self-Directedness; C: Cooperativeness; ST: Self- Transcendence; BIS: Barratt Impulsiveness Scale
Table 5: Bivariate analysis of sociodemographic, clinical, and psychological factors associated with treatment retention.
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