Table 6.

Performances of reported OSA monitoring using the signals from nearable devices

Type	Signals	# of Rec.	Classification type	Performance	Ref.
Radar	UWB	36	AH events (AH/N)	ACC = 93.0%, k = 0.728	[72]
			OSA severity (avg. cutoff ≥ 5,15,30)	ACC = 98.0%, k = 0.96
		176	OSA severity (AHI ≥ 5,15,30)	SENS = 1, SPEC = 1, AUC = 1	[73]
				SENS = 0.97, SPEC = 0.96, AUC = 0.991
				SENS = 0.95, SPEC = 0.99, AUC = 0.994
		94	OSA severity (AHI ≥ 5,15,30)	Corr.=0.927 ACC = 93.0 ACC = 91.0 ACC = 100.0	[74]
	Doppler	12	AH events (AH/N)	SENS = 86.0% SPEC = 91.0% ACC = 92.0%	[75]
	FMCW	10	AH events (Apneic/Not-apneic)	ACC = 95.53%, k = 0.68	[76]
		44	AH events	Binary (AH/N), k = 0.715 Multi (A/H/N), k = 0.648	[77]
Mobilephone	Audio, LC	50	OSA severity (AHI ≥ 15)	SENS = 0.70, SPEC = 0.94, Corr.=0.94	[78]
		13	AH events *ref: ApneaLinkTM	SENS = 87.96%, SPEC = 75.22%, ACC = 81.79%	[79]
	Audio, LN	128	OSA severity (AHI ≥ 15)	SENS = 88.3%, SPEC = 80.0%, ACC = 84.2%, AUC = 0.92	[80]
		1315 (phone 297)	AH events (3class-A/H/N, 2class-AH/N)	ACC = 85.9%, k = 0.66 ACC = 88.8%, k = 0.71	[43]
			OSA severity (AHI ≥ 5,15,30)	AUC = 0.93, AUC = 0.85, AUC = 0.94
Film/Bed installed	PVDF	26	AH events (apneic/non-apneic)	ACC = 85.5%, k = 0.60	[81]
			OSA severity (AHI ≥ 5,15,30)	ACC = 96.2, k = 0.84, ACC = 96.2, k = 0.92, ACC = 92.3, k = 0.85
		24	OSA severity (AHI ≥ 5)	SENS = 100%, SPEC = 82%, ACC = 96%	[82]
	Load cell	14	OSA severity (4 class, Normal/Mild /Moderate/Severe)	ACC = 74.3%	[83]

# of Rec. number of data used in the study, Ref. reference, ACC. accuracy, SENS sensitivity, SPEC specificity, AUC area under the curve, k kappa coefficient, Corr. Correlation coefficient, LC located chest of subject, LN located near to the subject