From:  Digital sleep measures and white matter health in the Framingham Heart Study

Summary of sleep measures

Sleep variable(Mean ± SD)
ODI/hour of sleep7.50 ± 7.26
SpO2 time under 90%9.39 ± 15.33
HFC duration (min)191.31 ± 98.97
HFC %42.00 ± 19.44
LFC duration (min)171.31 ± 89.92
LFC %38.15 ± 18.21
e-LFC duration (min)86.44 ± 68.66
e-LFC %19.27 ± 14.81
e-LFCBB duration (min)74.66 ± 56.98
e-LFCBB %16.66 ± 12.39
e-LFCNB duration (min)11.78 ± 23.37
e-LFCNB %2.61 ± 5.07
Wake (#)40.04 ± 35.19
Return to article view

ODI: oxygen 3% desaturation index; SpO2: pulse oxygen saturation; HFC: high frequency coupling % of total estimated sleep time; LFC: low frequency coupling % of total estimated sleep time; e-LFC: elevated-low frequency coupling % of total estimated sleep time; e-LFCBB: broadband e-LFC (generic sleep fragmentation, including apnea); e-LFCNB: narrowband e-LFC (activation of the respiratory chemoreflex); Wake: estimated actigraphic wake during the sleep period