Table 2.
Baseline data differences
| Placebo | Light | |
|---|---|---|
| Motivation to weight loss, n | ||
| No change | 0 | 0 |
| Somewhat | 22 | 24 |
| Definite | 12 | 10 |
| Expectation towards weight loss, n | ||
| No change | 0 | 0 |
| Somewhat | 27 | 25 |
| Definite | 7 | 9 |
| Retrospective expectation judgment, n | ||
| No change | 16 | 9 |
| Somewhat | 18 | 25 |
| Definite | 0 | 0 |
| Time of sleep onset | 23:13 ± 38 min | 23:12 ± 36 min |
| Time of sleep offset | 7:10 ± 33 min | 7:07 ± 29 min |
| Photoperiod, h | 9.9 ± 2.2 | 9.8 ± 2.3 |
| Air temperature, ° C | −16.9 ± 12.4 | −12.6 ± 12.5 |
| Clear sky (%) × photoperiod per day | 6.4 ± 2.0 | 5.9 ± 1.9 |
| Adverse events, n | no | 2× headache |
| 2× eyestrain, glare | ||
| 2× shorter menstrual cycle |
Figures indicate mean ± SD (and range), median (and range), or number n. No significant differences between variables at placebo and light sessions were observed.