Table 2.
Beck Depression Inventory-Second Edition (BDI-II) scores and salivary cortisol levels for the bright light therapy group and the control group over time.
| Variable | Mean (Standard Deviation) | p | |
|---|---|---|---|
| Control (n = 30) | Bright Light Therapy (n = 30) | ||
| BDI-II Score | |||
| T0 | 30.17 (9.33) | 27.17 (8.53) | 0.199 |
| T1 | 28.90 (9.22) | 18.33 (7.86) | <0.001 |
| T2 | 27.37 (10.25) | 18.17 (7.44) | <0.001 |
| Salivary cortisol level (nmol/L) | |||
| T0 | 16.05 (12.54) | 19.07 (25.08) | 0.558 |
| T1 | 18.70 (12.19) | 14.35 (11.39) | 0.158 |
| T2 | 20.14 (14.74) | 10.93 (5.44) | 0.003 |
BDI-II: Beck Depression Inventory-Second Edition (BDI-II); T0: baseline; T1: week 3; T2: week 6.