Table 1.
Demographic and Clinical Characteristics of Participants
| Healthy Control (N = 16) |
Pre School Onset Major Depression (PO-MDD) (N = 22) |
Group Comparison | |||
|---|---|---|---|---|---|
| Variable | Mean | SD | Mean | SD | |
| Age (in years) | 9.0 | 0.89 | 9.3 | 1.03 | T(36) = 0.85, p=.40 |
| Gender (% Males) | 44% | 41% | Χ2(2) = 0.56 | ||
| Ethnicity (% Caucasian) | 69% | 46% | Χ2(2) = 0.32 | ||
| Parental Education | 2.71 | 1.14 | 2.64 | 1.00 | T(36) = 0.22, p=.80 |
| Parental Income | 2.75 | 1.24 | 2.76 | 1.22 | T(36) = 0.03, p=.97 |
| # of MDD symptoms endorsed at Time 1 | 1.24 | 1.24 | 7.13 | 3.1 | T(36) = 6.98, p<.001 |
| Average # of MDD symptoms endorsed across all four assessments | 1.27 | 1.33 | 5.97 | 3.30 | T(36) = 5.38, p<.001 |
| Average # of Internalizing symptoms endorsed across all four assessments | 1.59 | 0.68 | 4.44 | 2.09 | T(36) = 5.24, p<.001 |
| Average # of externalizing symptoms endorsed across all four assessments | 1.47 | 1.50 | 7.87 | 5.23 | T(36) = 4.73, p<.001 |
| Parent CDI at time of scan | 6.86 | 5.52 | 10.10 | 5.70 | T(36) = 1.67, p=.11 |
| Child CDI at time of scan | 3.79 | 3.33 | 5.81 | 6.62 | T(36) = 1.06, p=.30 |
| Mood Rating Prior To Mood Induction | 4.6 | 0.7 | 4.4 | 0.7 | T(36) = 1.05, p=.30 |
| Mood After Mood Induction | 2.7 | 1.4 | 2.7 | 1.3 | T(36) = 0.09, p=.9 |