Intraindividual variability in sleep and comorbid medical and mental health conditions

摘要

This is the first study to investigate intraindividual variability (IIV; i.e. within-person night-to-night variation) in total sleep time, sleep quality, sleep efficiency, and circadian midpoint and comorbidity with common medical and mental health conditions in a racially/ethnically and age representative sample. Increased IIV in total sleep time was associated with elevated odds of having breathing, gastrointestinal, and neurological problems, as well as depression and pain, independently of mean sleep, age, body mass index, gender, and race. Future research should continue examining IIV in sleep as a distinct facet of disturbed sleep. Theoretical models and prospective, longitudinal studies are needed to understand the psychobiological pathways by which IIV in sleep may relate to medical conditions over time