Table 1

Summary of performance for the WADD and SOMNO across the seven breathing exercises (as detailed in procedure)

Exercise	Sensitivity (%)		Specificity (%)
Exercise	WADD	SOMNO	WADD	SOMNO
(A) WADD versus SOMNO performance in instructed exercises with hypopnoeas NOT considered as events
T1	NA	NA	100	99.2
T2	NA	NA	100	90.6
T3	94.6	38	99	96.9
T4	98.9	38.8	99.7	94.5
T5	99.2	31.4	99.2	99.7
T6	NA	NA	100	96.5
T7	94.2	48.2	98.5	99
Total	97.7	37.8	99.6	96.5
(B) WADD versus SOMNO performance in instructed exercises with hypopnoeas and apnoeas indistinctively considered as events
T1	NA	NA	100	99
T2	NA	NA	100	81.4
T3	96.7	66.3	99	87.5
T4	100	64.6	99.7	87.9
T5	99.2	59.2	99.2	95.1
T6	NA	NA	100	89.8
T7	99	64.4	97	93.4
Total	99.2	62.8	99.5	90.5

Exercise	TP		TN		FC		FP		FN
Exercise	WADD	SOMNO	WADD	SOMNO	WADD	SOMNO	WADD	SOMNO	WADD	SOMNO
(C) Summary of classification of the different epochs
T1	0	0	380	376	0	0	0	4	0	0
T2	0	0	360	293	0	0	0	67	0	0
T3	89	61	285	252	2	26	3	36	3	31
T4	356	230	363	320	4	92	1	44	0	126
T5	357	213	365	350	0	100	3	18	3	147
T6	0	0	400	359	0	0	0	41	0	0
T7	189	123	191	184	9	31	6	13	2	68
Total	991	627	2344	2134	15	249	13	223	8	372

Part (a) of the table shows the sensitivity and specificity not considering hypopnoeas as events (ie, all hypopnoeas are considered breathing). Based on this all FCs (apnoeas wrongly classified as hypopnoeas) are considered FNs; and all FPs hypopnoeas are considered TNs. Part (b) shows the sensitivity and specificity considering apnoea and hypopnoea as indistinctive events. Based on this all FC are reclassified as TPs; and all FP hypopnoeas are FPs. Part (c) details the number of epochs corresponding to a particular classification.
FC, false classification; FN, false negative; FP, false positive; TN, true negative (breathing); TP, true positive (apnoea); WADD, wearable apnoea detection device.