“…The authors concluded that nightly deviations in both the timing and duration of sleep in adolescents related to adverse metabolic outcomes, and they put forth important next steps to elucidate the direct and indirect effects of night‐to‐night variability in sleep duration and irregularity of sleep timing. Building on aspects of that review, Moreno and colleagues developed and validated a novel approach to modeling intraindividual temporal trends in circadian regularity by using information on light exposure and activity from a wearable device to calculate the Entrainment Signal Regularity Index (ESRI) [29]. The authors postulated that the ESRI may be better suited than other measures of sleep regularity to capture health effects of less granular, more systematic deviations in sleep schedules over time.…”