Table 2.
Descriptive statistics overall and by gender and pubertal status.
| Variable | Full sample M (SD) |
Girls M (SD) |
Boys M (SD) |
Prepubertal M (SD) |
Postpubertal M (SD) |
|---|---|---|---|---|---|
| Age | 11.6 (2.4) | 11.65 (2.4) | 11.53 (2.4) | 10.67 (2.07) | 13.75 (1.45) b |
| Puberty | 31.7% | 43.4% (.49) | 17.5% (.37)a | -- | -- |
| 5-HTTLPR | |||||
| SS | 21.1% | 19.3% | 22% | 20.8% | 20.9% |
| SL | 46.2% | 50.3% | 41.1% | 45% | 46.9% |
| LL | 30.5% | 27.9% | 34% | 31.2% | 30.1% |
| High Peer Stress | 25.9% | 28.6% | 22.6% a | 25% | 26.3% |
| Past Depression | 20% | 23% | 17% a | 15% | 32% b |
| Future Depression | 25.6% | 31% | 19% a | 18.75% | 40% b |
Note. Full sample N = 665; Girls n = 365; boys n = 300; Prepubertal n = 450; Postpubertal n = 215.
Denotes significant gender difference.
Denotes significant pubertal group difference.
Puberty = Prepubertal status (0) or pospubertal status (1). 5-HTTLPR = functional variation in the Transporter-Linked Polymorphic Region of the gene SLC6A4, which codes for the serotonin transporter. High Peer Stress Group = Little to Normal Stress (0); Moderate to High Stress (1), as assessed by the Youth Life Stress Interview. Past Depression = Clinically significant depressive episode, as diagnosed via K-SADS prior to baseline. Future Depression = Clinically significant depressive episode, as diagnosed via K-SADS administered repeatedly every 6-months, that occurred at some point after baseline through 36-months follow-up.