Characterization of ILI Burden Using Wearable Sensor Measures: Sleep
EVENTS, INFLUENZA
Across the study period, participants in the ILI population slept an average of 427 minutes (7.1 hours) per day, with an average sleep efficiency score of 89.2%.Sleep duration changed during ILI events. Shortly before ILI onset, sleep duration began to increase from baseline values, with the peak change occurring on day 0 when participants slept 43 minutes more than baseline values on average across the ILI population. In the participants who tested positive for influenza, the peak change occurred on day +1 when they slept 87 minutes more than baseline values (Sleep efficiency decreased from baseline levels during ILI events, beginning on day −1 and peaking on day 0, when sleep efficiency was 2.34% lower than baseline levels on average across the ILI population. In the participants who tested positive for influenza, the peak change was −3.62%, which also occurred on day 0 (