Table 1.
Characteristics of the sample at 16 years of age who were retained or attrited at 25 years of age
| Male | Female | |||||
|---|---|---|---|---|---|---|
| Retained (N=305) |
Attrited (N=151) |
Test Statistics | Retained (N=135) |
Attrited (N=27) |
Test Statistics | |
| SUD in father (probands) | 49% | 56% | χ2=.06,p=.81 | 41% | 52% | χ2=.35,p=55 |
| SUD in mother | 20% | 26% | χ2=.07,p=79 | 20% | 39% | χ2=2.66,p=.10 |
| IQ (Mean, SD) | 108.7(15.3) | 106.3 (16.5) | t=2.61,p=.01 | 104.8(17.2) | 100.7 (14.4) | t=2.43,p=.02 |
| Family SES (Mean, SD) | 41.4(13.2) | 40.8(13.6) | t=1.50,p=.13 | 42.7 (14.7) | 41.0(16.1) | t=1.60,p=.14 |
| Ethnicity | ||||||
| • Euro-American | 77% | 78% | χ2=.98,p=32 | 67% | 59% | χ2=.08,p=78 |
| • African American | 23% | 22% | 33% | 41% | ||
| Transmissible Liability | .05(1.01) | .12(1.06) | t=−.57, p=.56 | −.23 (.97) | .04 (.87) | t=−1.04, p=.29 |
| Index (TLI) (z score) | ||||||
| Consumption Frequency | 1.86(2.34) | 2.16(2.43) | t=−1.52,p=.13 | 1.52(1.95) | 2.50 (2.34) | t=−2.79, p=.006 |
| Index (CFI)1 | ||||||
| Overall Problem Density | 18.52(12.79) | 16.28 (12.34) | t=1.58, p=.ll | 20.38(12.85) | 21.99(13.37) | t=−.48, p=.63 |
| Score (OPD) (%)2 | ||||||
1
Consumption events in past month
2
Score ranges from 0–10