Circadian misalignment (CM) is a sleep disruption where an individual’s circadian rhythm and actual sleep-wake cycle are unsynchronized. CM is frequently misdiagnosed and difficult to treat but can adversely impact short-term and long-term health outcomes. CM often interacts bidirectionally with chronic conditions affecting cognitive and physical functionality. Continuous physiological monitoring (CPM) of the hormone melatonin would support real-time, patient-driven interventions to address CM. However, patient-driven self-care tasks involve complex information processing and decision-making. Effective CPM use requires situation awareness regarding current circadian health and projected future status, sufficient background knowledge to identify circadian intervention alternatives, and selection of appropriate alternatives given their current state. Melatonin data has characteristics distinct from biomarkers previously subject to CPM, introducing further challenges around data presentation. Task analysis efforts can identify the cognitive processes involved in five different tasks associated with a continuous melatonin monitor to identify necessary informational elements to include in interface design.
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