Table 2.
Prevalence of past-year substance use diagnoses and other psychiatric diagnoses in emerging adults and adults
| Diagnoses | (N = 499), n | Emerging adults (n = 149), % | Adults (n = 350), % | χ2 | p value | Effect size |
|---|---|---|---|---|---|---|
| Alcohol (F10) | 239 | 32.1 | 57.5 | 25.19 | 0.000 | 0.23 |
| Opioids (F11) | 108 | 21.2 | 23.3 | 0.25 | 0.614 | 0.02 |
| Cannabis (F12) | 213 | 74.5 | 32.7 | 68.65 | 0.000 | 0.38 |
| Sedatives (F13) | 164 | 42.3 | 31.3 | 5.29 | 0.021 | 0.11 |
| Cocaine (F14) | 20 | 7.3 | 2.9 | 4.59 | 0.032 | 0.10 |
| Stimulants (F15) | 188 | 54.0 | 33.6 | 16.97 | 0.000 | 0.19 |
| Hallucinogens (F16) | 11 | 6.6 | 0.6 | 15.45 | 0.000 | 0.18 |
| Multiple drugs (F19) | 33 | 10.2 | 5.6 | 3.22 | 0.073 | 0.08 |
| Affective disorders (F30–39) | 92 | 21.5 | 17.1 | 1.31 | 0.253 | 0.05 |
| Anxiety disorders (F40–48) | 133 | 30.9 | 24.9 | 1.93 | 0.164 | 0.06 |
| Personality disorders (F60–69) | 66 | 12.1 | 13.7 | 0.24 | 0.622 | 0.02 |
| ADHD (F90) | 75 | 24.2 | 11.1 | 13.87 | 0.000 | 0.17 |
| Other psychiatric disorders | 49 | 13.4 | 8.3 | 3.11 | 0.078 | 0.08 |
| Any mental disordera | 265 | 63.8 | 48.6 | 9.68 | 0.002 | 0.14 |
ADHD, attention deficit hyperactivity disorder. Significant p values (<0.05) are in bold.
a
The most prevalent past-year comorbid mental disorders were affective disorders and anxiety disorders.