Table 3.

Sleep architectural features by cognition state and OSA

Measure	NC group			NDD group			Group p
	No OSA	OSA	p	No OSA	OSA	p
Sleep time; h	6.2±1.0	6.4±0.8	0.35	6.2±1.8	6.5±0.7	0.56	0.75
Sleep efficiency; %	79.6±8.9	83.1±6.2	0.11	78.5±13.2	82.6±9.4	0.32	0.79
Time supine; %	30.3±27.9	31.9±28.8	0.83	51.7±30.7	56.0±30.3	0.67	<0.001
% >2 h supine sleep	37.3	38.9	0.89	71.9	61.5	0.72	<0.001
Head position changes; h	2.3±1.1	1.9±1.2	0.32	2.1±1.8	2.0±0.7	0.99	0.47