| 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) |
