Table 1.
Descriptive information for demographic, alcohol-related, and trauma-related characteristics of the sample
| Mean (s.d.) or N (%) | Male baseline N = 797 | Female baseline N = 855 | z/t/χ2 | p |
|---|---|---|---|---|
| Race/ethnicity | ||||
| White | 468 (58.72) | 506 (63.49) | −0.19 | 0.849 |
| Black/African American | 251 (31.49) | 277 (32.40) | −0.39 | 0.697 |
| Asian | 3 (0.38) | 4 (0.47) | −0.29 | 0.771 |
| Hispanic | 104 (13.05) | 99 (11.58) | 0.91 | 0.363 |
| N at follow-up 1 | 653 (81.93) | 701 (81.99) | −0.03 | 0.976 |
| N at follow-up 2 | 461 (57.84) | 508 (59.42) | −0.65 | 0.516 |
| N at follow-up 3 | 319 (40.02) | 366 (42.81) | −1.15 | 0.250 |
| Age at baseline | 14.44 (1.54) | 14.16 (1.49) | −3.76 | <0.001 |
| Age at follow-up 1 | 17.82 (2.85) | 17.74 (2.70) | −0.59 | 0.558 |
| Age at follow-up 2 | 20.41 (3.18) | 20.51 (3.40) | 0.62 | 0.538 |
| Age at follow-up 3 | 22.74 (3.31) | 22.39 (3.85) | −1.98 | 0.050 |
| Parental education (years) | 13.16 (2.21) | 13.04 (2.14) | −1.03 | 0.304 |
| Ever drink | 660 (82.81) | 707 (82.69) | 0.07 | 0.952 |
| Regular drinker | 542 (68.01) | 566 (66.20) | 0.78 | 0.435 |
| Maximum drinks | 14.90 (12.71) | 9.85 (9.79) | −9.08 | <0.001 |
| Onset age of regular drinking | 17.48 (2.49) | 17.85 (2.43) | 3.06 | 0.002 |
| AUD symptoms (full sample) | 1.45 (2.09) | 1.03 (1.87) | −4.31 | <0.001 |
| Any childhood trauma | 258 (32.37) | 249 (29.12) | 1.43 | 0.153 |
| Non-assaultive trauma | 216 (27.10) | 201 (23.51) | 1.68 | 0.093 |
| Physical-assaultive trauma | 99 (12.42) | 44 (5.15) | 5.25 | <0.001 |
| Sexual-assaultive trauma | 11 (1.38) | 54 (6.32) | −5.16 | <0.001 |
| Any trauma by follow-up 3 | 408 (51.19) | 459 (53.68) | −5.06 | <0.001 |
| PTSD symptoms* | 0.75 (2.60) | 1.56 (3.84) | 3.59 | <0.001 |
| AUD symptoms* | 1.20 (1.91) | 0.95 (1.72) | −2.03 | 0.043 |
Note: AUD, alcohol use disorder, and PTSD, post-traumatic stress disorder. PTSD symptoms were assessed only in those who reported a history of trauma. Maximum drinks, AUD symptoms, PTSD symptoms were lifetime measures assessed at follow-up 3. *These items (PTSD and AUD symptoms) were calculated among individuals who reported any trauma exposure by follow-up 3. Bold text indicates p-value less than 0.05. Bold italic text indicates p-value less than 0.01.