Table 4.
Intake and 10 Year Characteristics of Alcohol/Drug Use Trajectories by Posterior Probability Class Assignment (N =153).
| Class 1 Abstainer | Class 2 Late Adol | Class 3 Emg Adult | Class 4 Freq Drink | Class 5 FD/DD | Class 6 Chronic | Diff | |
|---|---|---|---|---|---|---|---|
| Intake | |||||||
| Age | 16.0 (1.5) | 15.8 (1.2) | 15.7 (1.3) | 16.4 (1.1) | 15.5(1.0) | 15.9(1.5) | F(5,147)=1.5 |
| Sex (F) | 56.8% | 33.3% | 31.8% | 52.0% | 26.9% | 22.2% | χ2(df=5)= 10.7 |
| Caucasian | 54.5% | 55.6% | 50.0% | 56.0% | 53.9% | 44.4% | χ2(df=5)= 0.5 |
| SES | 29.6(12.1) | 29.4(9.8) | 26.9(13.4) | 27.6(11.7) | 32.6(12.1) | 38.8(20.6) | F(5,146)=1.6 |
| AlcMax | 7.5(7.1) | 11.7(9.6) | 10.7(9.3) | 13.4(11.5) | 16.9(12.6) | 14.0(14.3) | F(5,146) = 3.1* |
| HEDrk | 57.1% | 74.1% | 77.3% | 76.0% | 80.0% | 66.7% | χ2(df=5)= 5.8 |
| MJ Freq | 12.8(12.5) | 19.8(10.7) | 19.3(12.0) | 10.8(11.6) | 17.5(12.5) | 17.2(12.7) | F(5,147)=2.5* |
| Control Variables | |||||||
| Incarcerated | 31.8% | 63.0% | 77.3% | 48.0% | 65.4% | 88.9% | χ2(df=5)= 20.5*** |
| Treatment (Inpt/Outpt) | 5% (3% /3%) | 26% (19% /15%) | 17% (12% 16%) | 12% (8% /12%) | 0% | 44% (20%/ 43%) | Fisher's Exact Test** |
| 10 Year Status | |||||||
| HS Grad | 71.1% | 65.2% | 44.4% | 82.6% | 64.0% | 28.6% | χ2(df=5) = 11.2* |
| SES | 43.1(14.8) | 53.1(12.6) | 50.8(11.8) | 42.0 (13.6) | 51.7(17.8) | 55.9(13.3) | F(5,H2) = 2.8* |
| Occupation | χ2(df=5)= 24.8* | ||||||
| Unemploy | 6.5% | 4.8% | 12.5% | 15.8% | 21.8% | 42.9% | |
| Unskilled | 41.9% | 81.0% | 68.8% | 31.6% | 47.8% | 42.9% | |
| Professional | 45.2% | 9.5% | 12.5% | 47.4% | 26.1% | 14.3% | |
| Managerial | 6.5% | 4.8% | 6.3% | 5.3% | 4.4% | 0% | |
| Married | 48.5% | 13.0% | 16.7%% | 52.2% | 36.0% | 0% | χ2(df=5)= 17.5** |
| Parent | 55.3% | 39.1% | 38.9% | 60.9% | 36.0% | 28.6% | χ2(df=5)= 6.0 |
Note: Class assignment is based on highest posterior probability of class membership. Alc Max: Maximum drinks/episode; HEDrk: heavy episodic drinkers (percent reporting 4+/5+drinks [females/males] per episode); MJ Freq: average days using marijuana per month; HS Grad: high school graduation; SES: socioeconomic status; Unemployed: Unemployed; Treatment: AOD treatment;
*
p<.05
**
p<.01
***
p<.001