. Author manuscript; available in PMC: 2013 Mar 18.

Published in final edited form as: JAMA. 2011 Aug 10;306(6):613–619. doi: 10.1001/jama.2011.1115

Table 2.

Sleep disordered breathing, sleep fragmentation, and sleep duration measures (N=298)

	Median	Interquartile Range
Apnea-Hypopnea Index, events/hour of sleep	10.0	5.2 - 19.5
Hypoxia/Disordered Breathing Measures
Oxygen Desaturation Index, events/hour of sleep	14.5	8.1 - 23.6
Sleep time with SaO₂ < 90%, %	0.5	0.1 - 2.8
Sleep time in apnea/hypopnea with >3% desaturation, %	4.2	1.4 - 9.2
Sleep Fragmentation Measures
Arousal Index, arousals/hour sleep	18.0	12.4 - 26.3
Wake after sleep onset, minutes	79.0	52.0 - 125.0
Sleep Duration Measure
Total sleep time, hours	6.0	5.3 - 6.7