Table 4.

Correlations Between PDSS Scores and Sleep-Wake Variables

		PDSS Score
Age	r	0.098*
	P	0.027
Wake up time school day	r	0.101*
	P	0.026
Wake up time free days	r	0.240**
	P	<0.001
Bedtime school days	r	0.222**
	P	<0.001
Bedtime freedays	r	0.154**
	P	0.001
Sleep duration school days	r	−.138**
	P	0.002
Sleep duration free days	r	0.095*
	P	0.039
Average sleep duration	r	0.047
	P	0.304
Midsleep time school days	r	0.239**
	P	<0.001
Midsleep time free days	r	0.244**
	P	<0.001
Social jetlag	r	0.130**
	P	0.004
Chronotype (MSFsc)	r	0.222**
	P	<0.001

Notes: **Indicates P<0.01, *Indicates P<0.05.