Table 1.
Participant Characteristics for Individuals with and without a History of MDD at the Autobiographical Memory Test (AMT)
| History of MDD (n = 164) | No History of MDD (n = 275) | ||
|---|---|---|---|
| % (n) | % (n) | p-value | |
| Female gender | 74% (121) | 65% (179) | p = .06 |
| White race/ethnicity | 61% (100) | 58% (159) | p = .52 |
| History of anxiety disorders at the AMTa | 38% (62) | 14% (38) | p < .0001 |
| History of substance abuse disorders at the AMTb | 29% (47) | 18% (49) | p = .01 |
| M (SD) | M (SD) | p-value | |
| EPQ-R-N total score at screeningc | 14.3 (3.7) | 11.1 (4.4) | p < .0001 |
| Hollingshead SES index at baseline | 48.5 (13.2)d | 48.9 (12.2)d | p = .77 |
| Age at the AMT | 22.5 (0.9) | 22.4 (0.9) | p = .21 |
Note.
Anxiety disorders assessed included generalized anxiety disorder, obsessive-compulsive disorder, social anxiety disorder, panic disorder, and agoraphobia without panic.
Substance abuse disorders assessed included alcohol and non-alcohol abuse and dependence.
Neuroticism risk based on responses to the Eysenck Personality Questionnaire-Revised neuroticism scale (EPQ-RN) administered at screening.
Mean Hollingshead socioeconomic status (SES) index scores for both groups corresponded to minor professionals (e.g., insurance agents, sales representatives), workers at medium-sized businesses, and technical workers (Hollingshead, 1975).