Variables Cluster 1
(n=60)
Cluster 2
(n=40)
Test p
Age, mean (SD) 32.40 (6.49) 26.62 (6.86) t=3.99, 98 df <0.01**
Marital status, n (%)

Married
Single
Separated / Widowed


24 (40)
30 (50)
6 (10)


11 (27.50)
25 (72.50)
4 (10)

χ2=1.78, 2 df
0.46
Race, n (%)

White
Non-white


37 (61.67)
23 (38.33)


19 (47.50)
21 (52.50)
 
χ2=1.96, 1 df
  0.16
Money spent on crack/cocaine use in the past 30 days (in R$, the Brazilian currency), mean (SD)   480 (526.45)   261.75 (272.67)   t=2.41, 98 df   0.02*
Monthly income (in R$), mean (SD) 1326.33 (1334.84) 950.75 (1052.46) t=1.50, 98 df 0.14
Number of days cocaine used in the last 30, mean (SD) 10.65 (8.76) 8.80 (7.99) t=1.07, 98 df 0.29
Days of cocaine used per week,
 mean (SD)
2.38 (1.70) 2.37 (1.83) t=0.02, 98 df 0.98
Grams of cocaine used in the last 30 days, mean (SD) 20.60 (26.29) 7.66 (7.72) t=3.02, 98 df < 0.01**
Age of first cocaine use, mean (SD) 19.72 (5.36) 21.82 (6.51) t=-1.77, 98 df 0.08
Route of administration, n (%)

Intranasal
Freebase
Both


21 (35)
17 (28.33)
22 (36.67)


23 (57.50)
6 (15)
11 (27.50)

χ2=5.23, 2 df

0.08
Live with other crack/cocaine users, n (%) 9 (15) 4 (10) χ2=0.58, 1 df 0.55
Involvement with criminal justice, n (%) 18 (30) 7 (17.50) χ2=2.06, 1 df 0.15
Number of sexual partners in the last 6 months, mean (SD) 3.77 (6.95) 1.95 (1.95) t=1.61, 98 df 0.11
Alcohol use, n (%)

< 50 units/week
≥ 50 units/week


43 (71.67)
17 (28.33)


28 (70)
12 (30)
 

χ2=0.03, 1 df
0.86
Number of days alcohol used in the last 30, mean (SD) 13.18 (12.70) 13.47 (12.62) t=-0.11, 98 df 0.91
Years of regular alcohol use,
mean (SD)
5.75 (3.17) 4.92 (2.25) t=1.42, 98 df 0.16
Smoking status, n (%)

yes
no


36 (60)
24 (40)


28 (70)
12 (30)

χ2=1.04, 1df
0.31
Cannabis users, n (%) 56 (93.33) 32 (80) χ2=4.04, 1df 0.06
Years of regular cannabis use,
mean (SD)a
4.29 (5.32) 2.87 (3.74) t=1.32, 86 df 0.19
Crack/cocaine craving intensity during the past week b, mean (SD) 5.93 (2.61) 5.60 (2.70) t=0.62, 98 df 0.54
Crack/cocaine craving frequency during the past week b, n (%)
Less than 3 times/day
More than 3 times/day


37 (61.67)
23 (38.33)


21 (52.50)
19 (47.50)

χ2=0.83, 1 df
0.36
Crack/cocaine craving duration during the last week b, n (%)
Less than 10 minutes
More than 10 minutes


28 (46.67)
32 (53.33)


19 (47.50)
21 (52.50)

χ2=0.01, 1 df
0.93
ASI subscales, mean (SD)
Drug
Family/Child
Alcohol
Psychiatric
Medical
Legal
Employment
Family/Social Support
Family/Social Problem

55.95 (12.46)
69.87 (1.50)
46.88 (12.29)
50.30 (9.03)
49.03 (7.37)
56.68 (8.60)
51.07 (6.54)
53.53 (21.90)
64.33 (13.57)

58.82 (11.32)
69.32 (2.44)
49.95 (11.25)
48.87 (8.61)
50.25 (6.56)
55.15 (7.55)
50.62 (6.34)
58.75 (19.88)
64.02 (14.18)

t=-1.17, 98 df
t=1.37, 98 df
t=-1.26, 98 df
t=0.79, 98 df
t=-0.84, 98 df
t=0.92, 98 df
t=0.33, 98 df
t=-1.21, 98 df
t=0.11, 98 df

0.24
0.17
0.21
0.43
0.40
0.36
0.74
0.23
0.91
*: p<0.05
a computed only for those that admitted to using cannabis
b measured by the MCCS (Minnesota Cocaine Craving Scale)
Table 3: Baseline characteristics.
Goto home»