Table 1.

Extracted SpO₂ measures

Name	Descriptions
SpO2 ENT	Entropy of overnight SpO2 signal
SpO2 STD	Standard deviation of overnight SpO2 signal
BAB	Area under the overnight average of SpO2 divided by total sleep time in seconds (below average burden)
ODB AVG	Average of normalized overnight desaturation burdens* of desaturation episodes
ODB STD	Standard deviation of normalized overnight desaturation burdens* of desaturation episodes
ODB ENT	Entropy of normalized overnight desaturation burdens* of desaturation episodes
NDB	Cumulative overnight desaturation burdens* divided by the total sleep time in seconds (nocturnal desaturation burden)

^*Desaturation burden: area under the curve of desaturation episodes with respect to the maximum SpO₂ level within 100 s before SpO₂ starts rising again