Table 2.

Sleep variable loadings for principal component analysis.

	Sleep Variable	Sleep Discontinuity	Sleep Time
Mean	Total Sleep Time	–0.078	0.974
	Wake After Sleep Onset	0.919	–0.203
	Sleep Fragmentation	0.825	–0.420
	Number of Awakenings	0.909	0.159
Variance	Total Sleep Time	0.523	0.504
	Wake After Sleep Onset	0.736	0.091
	Sleep Fragmentation	–0.022	0.943
	Number of Awakenings	0.898	–0.011

The table displays the loadings for the sleep variables of interest. Bold text indicates the dominant variables.