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. Author manuscript; available in PMC: 2014 Nov 3.
Published in final edited form as: Sleep Biol Rhythms. 2004 Nov 11;2(3):174–183. doi: 10.1111/j.1479-8425.2004.00139.x

Table 6.

Correlations of illumination mesor with sleep

Significant Correlates Entire Sample Pearson r (P) Advanced subjects aMT6s < 0338 hr Pearson r (P) Delayed subjects aMT6s > 0338 hr Pearson r (P)
Actigraphic Sleep
Sleep Latency −0.24 (<0.001) −0.33 (<0.001) −0.17 (0.023)
Total Sleep Time −0.12 (0.011) −0.12 (0.116) −0.09 (0.223)
Wake After Sleep Onset −0.14 (0.004) −0.25 (0.001) −0.06 (0.409)*
Final Awakening Time −0.17 (<0.001) −0.13 (0.088) −0.12 (0.103)
Diary Sleep
Sleep Latency −0.24 (<0.001) −0.31 (<0.001) −0.16 (0.025)
Total Sleep Time 0.05 (0.309) −0.06 (0.407) 0.18 (0.016)*
Naps 0.00 (0.939) −0.11 (0.227) 0.08 (0.354)
4-Week Recall
Trouble Falling Asleep −0.20 (<0.001) −0.01 (0.920) −0.26 (<0.001)*
Wake Up Often in Night −0.18 (<0.001) −0.09 (0.218) −0.23 (0.002)
Wake Up Too Early −0.11 (0.018) −0.07 (0.376) −0.21 (0.004)
Total Sleep Time 0.07 (0.145) −0.10 (0.166) 0.20 (0.005)*
Sleep Quality 0.18 (<0.001) 0.02 (0.749) 0.26 (<0.001)*
*

Significantly different correlation for phase-advanced versus phase-delayed volunteers.