Table 2.
Demographic Characteristics at Baseline by Site.
| Pittsburgh (n = 92) | SRI (n = 126) | Duke (n = 140) | OHSU (n = 130) | UCSD (n = 169) | |
|---|---|---|---|---|---|
| Sex | |||||
| Females | 50 | 59 | 73 | 65 | 82 |
| Males | 42 | 67 | 67 | 65 | 87 |
| Age at Scan (Years) | |||||
| Mean | 16.2 | 15.0 | 15.2 | 16.1 | 15.8 |
| SD | 2.5 | 1.9 | 1.9 | 2.6 | 2.4 |
| Self-declared ancestry | |||||
| White | 71 | 98 | 76 | 109 | 129 |
| African American | 19 | 1 | 55 | 3 | 14 |
| Other | 2 | 27 | 9 | 18 | 26 |
| Socioeconomic Status | |||||
| 6-12 years | 7 | 4 | 12 | 7 | 17 |
| 13-20 years | 85 | 122 | 128 | 123 | 152 |
| Family History Alcohol Use Density | |||||
| Mean Score | 0.12 | 0.24 | 0.09 | 0.22 | 0.31 |
| SD | 0.30 | 0.60 | 0.24 | 0.43 | 0.54 |
| Cumulative Traumatic Events* | |||||
| Mean | 0.87 | 0.52 | 1.41 | 1.20 | 0.99 |
| SD | 1.13 | 0.80 | 0.94 | 1.21 | 0.98 |
Socioeconomic status (SES) was quantified using the highest years of education of either parent.
Pittsburg University of Pittsburgh Medical Center, SRI SRI International, Duke Duke University Medical Center, OHSU Oregon Health and Science University, UCSD University of California at San Diego.
*No participant met DSM criteria for PTSD at baseline.