Table 2.

Associations among self-reported sleep variables

	Quality	Bedtime	Latency	Wake time	Length night	Length day
Quality	*****	0.085	−0.397	0.093	0.530	−0.091
Bedtime	0.029	*****	−0.142	0.341	−0.096	0.106
Latencya	<0.001	0.001	*****	0.044	−0.304	0.012
Wake time	0.017	<0.001	0.292	*****	0.213	−0.083
Length night	<0.001	0.015	<0.001	<0.001	*****	−0.166
Length daya	0.023	0.008	0.782	0.038	<0.001	*****

Pearson’s r (upper diagonal) and p-values (lower diagonal) are reported, except for associations with sleep quality (ordinal), for which Spearman’s ρ is used.