Table 1.

PhysioNet Sleep Apnea Database Analysis

Measure	No Apnea (n=20)	Moderate Apnea (n=10)	Severe Apnea (n=40)	Combined (n=70)
Age(y)	32.6 ± 5.4	47.2 ± 5.9	50.9 ± 8.3	45.1 ± 10.8
Sex (M/F)	11 / 9	8 / 2	38 / 2	57 / 13
AHI, events/h of sleep	0.04 ± 0.10	12.1 ± 12	46 ± 22.6	28 ± 27.5
Apnea Time (min)	0	0.1 ± 0.07	0.62 ± 0.22	0.37 ± 0.34
e-LFC (proportion of spectral windows)	0.08 ± 0.05	0.25 ± 0.14	0.58 ± 0.27	0.39 ± 0.31
e-LFCNB (proportion of spectral windows)	0.002 ± 0.007	0.02 ± 0.04	0.20 ± 0.20	0.12 ± 0.18
e-LFCBB (proportion of spectral windows)	0.08 ± 0.05	0.23 ± 0.12	0.38 ± 0.20	0.28 ± 0.21

AHI: Apnea-hypopnea index

Apnea Time = proportion of total sleep time in apnea or hypopnea, by human visual scoring

LFC: low frequency coupling

e-LFC: elevated LFC

e-LFC_NB: narrow spectral band eLFC

e-LFC_BB: broad spectral band ELFC