Figure 5.

An example of defining the negative epiglottic pressure at which arousals would be triggered by respiratory stimuli using a Kaplan–Meier survival analysis in a subject with arousal threshold of −63.3 cm H₂O (traditional way of measurement). At the negative epiglottic pressure of −54.9, −69.5, and −72.2 cm H₂O, 25%, 50%, and 75% of the events would be terminated with arousals. (More data of individual traditional arousal threshold and the negative epiglottic pressure at which 25%/50%/75% of arousal would occur using survival analysis are listed in Supplementary Table S3)