Table 4.

Descriptive Information on Sleep Fragmentation Night

	Mean (min)	SD (min)	Range (min)
Duration of Time Spent Out of Bed
Awakening 1	32.9	3.2	29.8 – 38.7
Awakening 2	31.8	1.8	29.6 – 34.7
Awakening 3	32.4	2.5	29.9 – 37.1
	Mean (hh:mm)	SD (hh:mm)	Range (hh:mm)
Duration Between:
Lights Out & Awakening 1	2:06	0:09	1:48–2:21
End of 1st & Beginning of 2nd Awakening	2:06	0:07	1:59–2:20
End of 2nd & Beginning of 3rd Awakening	2:06	0:07	2:00–2:19
End of 3rd Awakening & Lights On	2:06	0:07	1:56–2:18