Table 2.

Correlation between actigraphic sleep data and self-reported data on the Munich Chronotype Questionnaire (MCTQ).

Measure	Correlation
	Work day	Free day
Sleep start time	r (101) = 0.34∗∗	r (101) = 0.50∗∗∗
Sleep end time	r (101) = 0.50∗∗∗	r (101) = 0.67∗∗∗
Sleep duration	r (101) = 0.17	r (101) = 0.38∗∗∗
Midpoint of sleep	r (101) = 0.64∗∗∗	r (101) = 0.71∗∗∗

^∗ p < 0.05; ^∗∗p < 0.001; ^∗∗∗p < 0.000. Correlations remained significant when controlling for gender, age, income, education level, race, marital status, and occupation.