Table 2 Adjusted mean values ± standard error for illumination (lux), melatonin (aMT6s), and sleep measures. Values were adjusted for effects of age and gender.
From: Daily illumination exposure and melatonin: influence of ophthalmic dysfunction and sleep duration
MANCOVA: Race Effects on Illumination, Melatonin, and Sleep | ||||
|---|---|---|---|---|
Variable | Black (mean ± SE) | White (mean ± SE) | F | p |
Light Mesor [log] | 1.03 ± 0.10 | 1.38 ± 0.08 | 6.033 | 0.022 |
Light Phase [hr] | 13.57 ± 0.34 | 14.54 ± 0.27 | 4.306 | 0.049 |
aMT6s Mesor [log] | 2.67 ± 0.14 | 2.31 ± 0.11 | 3.311 | 0.082 |
aMT6s Phase [hr, after midnight] | 2.35 ± 0.37 | 3.45 ± 0.29 | 4.745 | 0.040 |
Phase Angle Between aMT6s and Sleep Timing [hr] | 2.55 ± 0.43 | 2.25 ± 0.29 | 0.305 | 0.586 |
Mid-Sleep [hr] | 4.76 ± 0.34 | 5.51 ± 0.27 | 2.580 | 0.122 |
Sleep Duration [hr] | 5.75 ± 0.28 | 6.57 ± 0.21 | 4.800 | 0.039 |