Table 5.

Sensitivity and specificity analysis of actigraphy against PSG and epoch by epoch agreement for actigraphy with PSG.

	Actigraphy Activity Threshold
	Low	Medium	High	Automatic
Sensitivity, %	71.65	76.34	79.96	91.07
Specificity, %	80.37	74.50	69.40	40.93
PVS, %	90.52	88.68	87.24	80.14
PVW, %	52.00	54.61	56.96	63.65
Agreement, %	74.06	75.83	77.04	77.21
Kappaa	0.445	0.457	0.462	0.360
PABAKb	0.481	0.517	0.540	0.544

^aCohen’s kappa. ^bPrevalance and bias adjusted kappa. PSG = polysomnography, PVS = predictive value for sleep, PVW = predictive value for wakefulness.