Mood Instability

The study treats mood instability as a sensitive patient-centred outcome that may detect clinically relevant change better than relapse or recurrence outcomes. Mood instability is assessed using daily smartphone-based self-ratings through the Danish Monsenso system. Monthly mood instability scores are calculated with root mean square successive difference applied to daily mood ratings. Mood instability is associated with perceived stress, reduced functioning, reduced quality of life, relapse, and hospitalisation.