Table 2.
Age of onset patterns among participants with both an anxiety disorder and a substance use disorder1
| Percentage with anxiety disorder before | Percentage with concurrent | Percentage with SUD | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SUD | (in same year) onset | before anxiety disorder | ||||||||||
| SP(12) | GAD(25) | PD(20) | AGO(15) | SP | GAD | PD | AGO | SP | GAD | PD | AGO | |
| ALA (19) | 93.4*** | 43.6 | 55.6 | 62.8* | 3.3 | 9.6 | 12.3 | 8.3 | 6.6 | 56.4 | 44.4 | 37.2 |
| ALD (21) | 96.8*** | 56.8 | 67.4** | 75.7*** | 3.5 | 16.8 | 11.8 | 10.2 | 3.2 | 43.2 | 32.6 | 24.3 |
| DRA (18) | 92.1*** | 43.7 | 52.8 | 70.0** | 4.0 | 5.9 | 11.5 | 11.1 | 7.9 | 56.3 | 47.2 | 30.0 |
| DRD (19) | 95.5*** | 50.5 | 53.6 | 67.7 | 2.6 | 9.6 | 10.6 | 13.3 | 4.5 | 49.5 | 46.4 | 32.3 |
| Any SUD (18) | 90.0*** | 40.4* | 49.8 | 59.1 | 3.5 | 8.8 | 13.1 | 5.9 | 10.0 | 59.6 | 50.2 | 40.9 |
p<.05
p<.01
p<.001.
SP=social phobia; GAD=generalized anxiety disorder; PD=panic disorder; AGO=agoraphobia; ALA=alcohol abuse; ALD=alcohol dependence; DRA=drug abuse; DRD=drug dependence; SUD=substance use disorder.
All frequencies are weighted. Asterisks represent the results of analyses examining whether the proportion of cases with the anxiety disorder onset prior to the SUD onset is significantly different from .5. Numbers in parentheses in the top row and left column are the median ages of onset of each disorder. Percentages with anxiety disorder before or after SUD are derived from descriptive analyses eliminating cases with concurrent (in the same year) onsets.