Table 3.
Unadjusted frequencies of substance use outcomes by cocaine group status and age.
| 15 years (n = 358) | 17 years (n = 350) | |||||||
|---|---|---|---|---|---|---|---|---|
|
|
|
|||||||
| PCE (n = 183) | NCE (n = 175) | X2 | p | PCE (n = 175) | NCE (n = 175) | X2 | p | |
|
|
|
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| n (%) | n (%) | n (%) | n (%) | |||||
| Any drug usea | 66 (36.07) | 46 (26.29) | 3.98 | .05 | 76 (43.43) | 63 (36.00) | 2.02 | .16 |
| Alcohol usea | 24 (13.11) | 21 (12.00) | 0.10 | .75 | 38 (21.71) | 34 (19.43) | 0.28 | .60 |
| Nicotine usea | 34 (18.58) | 20 (11.43) | 3.57 | .06 | 51 (29.14) | 38 (21.71) | 2.55 | .11 |
| Marijuana usea | 45 (24.59) | 25 (14.29) | 6.04 | .01 | 52 (29.71) | 43 (24.57) | 1.17 | .28 |
| Any substance abuse/dependenceb | – | – | – | – | 31 (19.14) | 19 (11.59) | 3.58 | .06 |
| Alcohol abuse/dependenceb | – | – | – | – | 6 (3.70) | 2 (1.22) | 2.10 | .15 |
| Nicotine dependenceb | – | – | – | – | 15 (9.26) | 5 (3.05) | 5.46 | .02 |
| Marijuana abuse/dependenceb | – | – | – | – | 18 (11.11) | 15 (9.15) | 0.35 | .56 |
a
Assessed using self-report YRBSS (past 30 days) and biologic samples (urine specimens, hair, and/or bloodspots) and 15 and 17 years.
b
Assessed DSM-IV diagnosis of substance use disorders using self-report CDISC at 17 years.