Table 3.
Proportion of total sample reporting use n = 557 |
Frequency of use among active substance users n = 469 |
Frequency of Use among Use Pattern n (= 469)
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Test Statistic | ||||
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Class 1 Exclusive Alcohol Use n = 106 |
Class 2 Alcohol and Marijuana n = 85 |
Class 3 Alcohol and Cocaine/Crack n = 146 |
Class 4 Multiple-Substance Use n = 132 |
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Days of use | n (%) | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | |
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Alcohol | 414 (74.3) | 10.4 (10.4) | 7.5 (9.5) a | 11.4 (11.2) b | 8.6 (9.7) a | 14.2 (10.3) b | χ2(3) = 33.3** |
Marijuana | 233 (41.8) | 7.2 (10.6) | 0.02 (0.1) a | 15.6 (10.5) b | 0.1 (0.24) c | 15.6 (12.3) b | χ2(3) = 462.1** |
Cocaine/Crack | 252 (45.2) | 5.7 (8.4) | † | † | 7.7 (7.9) a | 11.7 (11.6) b | χ2(1) = 13.5** |
Opiates | 86 (15.4) | 2.3 (6.8) | † | † | 3.4 (10.5) | 4.7 (14.5) | χ2 (1) = 0.7 |
Poppers | 53 (9.5) | 1.0 (4.2) | 0.6 (2.8) | 0.6 (2.7) | 0.9 (4.7) | 1.8 (4.1) | χ2(3) = 5.8 |
Other Drug †† | 65 (11.7) | 1.8 (6.7) | 0.1 (0.5) a | 1.1 (4.1) b | 1.8 (8.3) b | 3.6 (16.2) b | χ2(3) = 32.2** |
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M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | ||
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AUDIT score (range 0–12) | 4.3 (3.5) | 5.1 (3.3) | 4.3 (3.1) a | 4.4 (3.1) a | 4.8 (3.5) a | 6.5 (2.7) b | F (3, 465) = 12.6** |
DAST score (range 1–10) | 3.9 (3.4) | 4.6 (3.3) | 0.5 (1.5) a | 4.1 (2.5) b | 6.0 (2.5) c | 6.6 (2.3) c | F (3, 465) = 174.6* |
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n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | ||
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Injection Drug Use | 33 (5.9%) | 33 (7.0) | 0 (0.0) a | 1 (1.2) a | 16 (11.0) b | 16 (12.1) b | ?2(3) = 21.1** |
p =.05
p =.01
Empty cell not included in follow up ANOVA
Amphetamines, sedatives, PCP, and solvents
Note: Where omnibus tests of between group differences were significant, group-by-group comparisons were evaluated using the LSD (count variables), Games-Howell (continuous variables with unequal cell variances), or Ficher Exact (for categorical variables) po Groups with different superscripts differ at p < .05. Groups which share a common superscript do not.