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NCANDA demographics for 1-year followup.
| Age (years) | mean= | 15.4 |
| SD= | 2.35 | |
| N= | 568 | |
| Male | mean= | 15.4 |
| SD= | 2.31 | |
| N= | 289 | |
| Female | mean= | 15.5 |
| SD= | 2.39 | |
| N= | 279 | |
| Socioeconomic statusa | mean= | 16.7 |
| SD= | 2.47 | |
| Family History of Alcoholism | ||
| negative, positive = 489, 79 | ||
| Self-declared Ethnicity | ||
| Caucasian | N= | 413 |
| African-American | N= | 80 |
| Asian | N= | 64 |
| Other | N= | 11 |
| Site | ||
| UPitt | N= | 78 |
| SRI | N= | 106 |
| Duke | N= | 116 |
| OHSU | N= | 114 |
| UCSD | N= | 154 |
Highest education of a parent.
