Table 3.
Correlations between white light exposure and main outcome variables.
| Outcome Variables | Total White Light Exposure | ||
|---|---|---|---|
| 6:00–12:00 | 20:00–0:00 | 22:00–6:00 | |
| IV | −0.749 ** | −0.037 | −0.257 |
| IS | 0.551 * | −0.183 | 0.176 |
| RA | 0.666 ** | −0.029 | 0.187 |
| Acrophase | 0.112 | 0.499 ° | 0.297 |
| Nocturnal Sleep Duration | −0.279 | −0.657 ** | −0.371 |
| Processing Speed | 0.503 ° | 0.415 | 0.147 |
| Depression | 0.039 | −0.047 | 0.210 |
| Fatigue | −0.075 | −0.462 ° | −0.002 |
| Sleep Quality | 0.238 | 0.242 | 0.419 |
Spearman’s ρ correlation coefficients (n = 14) between total white light exposure and intradaily variability (IV), interdaily stability (IS), relative amplitude (RA), acrophase, nocturnal sleep duration, processing speed, depression, fatigue and sleep quality. High values of sleep quality indicate low sleep quality. ° p ≤ 0.1; * p ≤ 0.05; ** p ≤ 0.01.