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. 2011 Nov 1;34(11):1569–1581. doi: 10.5665/sleep.1400
kAR Definition of Constant Region
Spearman Rho 0.50×s 0.75×s 1.00×s 1.25×s 1.50×s
Definition of Constant Region 0.50×s 1.00 0.96 0.93 0.92 0.91
0.75×s 1.00 0.98 0.97 0.96
1.00×s 1.00 0.99 0.99
1.25×s 1.00 > 0.99
1.50×s 1.00