Table 1. Demographic Information and Clinical Characteristics.
| Variable | No MDD outcome (n = 58) | MDD outcome (n = 31) | Statistics | p value |
|---|---|---|---|---|
| Age at T1, M (SD) | 13.37 (1.37) | 12.39 (1.48) | t(87) = 3.110 | 0.003 |
| CDI-S at T1, M (SD) | 1.52 (1.54) | 2.45 (2.84) | t(87) = 2.020 | 0.046 |
| Number of Rsk girls | 18/58 | 24/31 | χ2(1, N = 89) = 17.442 | < 0.001 |
| Ethnicity (% caucasian) | 65.5 | 80.6 | x2(1,89) = 2.236 | 0.135 |
| Age of menstration, M (SD) | 11.87 (1.12) | 11.33 (0.78) | t(41) = 1.524 | 0.135 |
| Tanner stage at T1 | 3.45 (0.91) | 3.15 (0.96) | t(87) = 1.468 | 0.146 |
| BMI, M (SD) | 19.68 (2.87) | 20.14 (2.82) | t(75) = .668 | 0.506 |
| Time of first cortisol collection (minutes from midnight), M (SD) | 773.53 (168.70) | 815.81 (167.60) | t(87) = 1.129 | 0.262 |
| Medication usage at T1, % | 4 | 6.50 | x2(1,89) = .425 | 0.608 |
| Cortisol reactivity, M (SD) | 30.21 (78.83) | 51.96 (100.05) | t(87) = 1.127 | 0.263 |
| Cortisol recovery, M (SD) | -22.52 (32.03) | -19.84 (71.09) | t(87) = .245 | 0.807 |
Note: Standard deviations are presented in parentheses. MDD = Major Depressive Disorder; No MDD outcome = participants who did develop major depressive disorder prior to age 21; MDD outcome = participants who did develop major depressive disorder prior to age 21; T1 = 1st visit to the laboratory (baseline); CDI = Children's Depression Inventory - Short Form.