Table 3.

Diaphragm EMG (EMG_di), tidal volume (V_T) and the efficacy of neural respiratory drive (V_T/EMG_di) during wakefulness, snoring and hypopnoea in patients with overlap syndrome

	EMGdi/max%			VT (mL/kg)			VT/EMGdi
Overlap subjects	Wakefulness	Snoring	Hypopnoea	Wakefulness	Snoring	Hypopnoea	Wakefulness	Snoring	Hypopnoea
1	49.0	54.7	48.1	5.1	4.0	1.2	0.10	0.07	0.02
2	23.1	25.2	25.4	5.8	4.1	2.6	0.25	0.16	0.10
3	28.1	37.8	35.3	10.2	7.5	3.2	0.36	0.20	0.09
4	58.3	50.8	52.8	5.6	4.3	1.9	0.10	0.08	0.04
5	21.0	18.2	14.8	9.3	6.9	5.1	0.44	0.38	0.34
6	31.3	22.3	12.1	5.9	8.3	2.4	0.19	0.37	0.20
7	17.1	23.4	22.8	9.5	7.5	4.1	0.56	0.32	0.18
8	48.9	38.7	39.1	7.0	3.6	2.3	0.14	0.09	0.06
9	18.2	23.3	18.1	8.5	6.4	4.5	0.47	0.27	0.25
10	12.3	18.1	12.9	9.3	9.3	4.9	0.76	0.51	0.38
11	14.9	22.0	18.7	8.5	4.3	1.8	0.57	0.19	0.10
12	17.1	19.5	20.2	8.9	4.3	1.7	0.52	0.22	0.08
13	25.4	29.2	24.2	6.3	4.4	2.1	0.25	0.15	0.09
14	14.0	13.0	12.6	7.3	6.1	4.4	0.52	0.47	0.35
15	58.7	55.3	46.2	5.8	3.7	2.8	0.10	0.07	0.06
16	30.9	24.2	28.8	6.1	4.9	2.2	0.20	0.20	0.08
Mean	29.3	29.7	27.0	7.4	5.6	2.9	0.35	0.24	0.15
SD	15.8	13.6	13.4	1.7	1.8	1.3	0.21	0.14	0.12

EMG_di%max, percentage of maximal diaphragm electromyogram.