Table 1.

Comparison of PSG Consensus versus Z-PLUS algorithm for each sleep stage (Wake, Light Sleep, Deep Sleep, and REM)

	PSG Consensus
	Wake	Light Sleep	Deep Sleep	REM
Algorithm
Wake	15,353 (90.8%)	2,721 (5.9%)	59 (0.9%)	81 (0.5%)
Light Sleep	1,109 (6.6%)	38,769 (83.5%)	1,700 (25.2%)	4,136 (27.3%)
Deep Sleep	0 (0.0%)	1,385 (3.0%)	4,974 (73.8%)	1 (0.0%)
REM	446 (2.6%)	3,548 (7.6%)	3 (0.0%)	10,921 (72.1%)
Number of epochs	16,908	46,423	6,736	15,139

Notes: The Wake state is scored by Z-ALG and unchanged by Z-PLUS.

Abbreviations: PSG, polysomnography; REM, Rapid Eye Movement.