Table 1.
Weekly average depression scores (±SD)
| Condition | N | Day 1 (SD) | Day 8 (SD) | Day 15 (SD) | Day 22 (SD) | Effect size d | % Response | Responder N | |
|---|---|---|---|---|---|---|---|---|---|
| SIGH-SAD | SLT | 11 | 25.6 (6.3) | 18.1 (8.0) | 10.9 (4.4) | 8.9 (6.8) | 2.54 | 65.2 | 8 |
| BLT | 11 | 25.4 (6.9) | 19 (6.0) | 14 (10.1) | 6 (4.0) | 3.53 | 76.4 | 11 | |
| HRSD | SLT | 11 | 13.8 (4.6) | 9.9 (4.3) | 6.8 (3.0) | 4.9 (3.9) | 2.09 | 64.5 | 9 |
| BLT | 11 | 13,7 (5.4) | 10,45(3.3) | 7.8 (4,9) | 3.4 (2.0) | 2.53 | 75.2 | 10 | |
| ATYP | SLT | 11 | 11.8 (4.6) | 8.2 (4.3) | 4 (2.2) | 4 (3.5) | 1.91 | 66.1 | 8 |
| BLT | 11 | 11.6 (3.5) | 8.5 (4.3) | 6.2 (5.8) | 2.6 (2.5) | 2.96 | 77.6 | 10 | |
| BDI-II | SLT | 11 | 23 (5.3) | 15.3 (8.1) | 9.1 (6.4) | 7.1 (6.4) | 2.71 | 69.1 | 9 |
| BLT | 11 | 26.6 (10.8) | 17.8 (11.7) | 14.9 (11.4) | 5.3 (3.8) | 2.63 | 80.1 | 10 | |
| SFQ | SLT | 11 | 24.6 (2.0) | 20.5 (7.0) | 16.5 (6.0) | 14.2 (5.5) | 2.51 | 42.3 | 4 |
| BLT | 11 | 25.2 (2.8) | 20.2 (6.2) | 18.5 (7.5) | 11 (4.5) | 3.79 | 56.3 | 8 | |
Cohen's d effect size and response percentage from day 1 to day 22, as rated by the Hamilton Rating Scale for Depression (HRSD, 17 items), the scale that has been adapted for seasonal symptoms SIGH-SAD (24 items), and the atypical symptoms separately ATYP (7 items), the score on the Beck Depression Inventory-II and the Short Fatigue Questionnaire for each condition. SLT = standard light treatment; BLT= blue-enriched white-light treatment
Responder = subject with an improvement of at least 50%