Association of insomnia phenotypes based on polysomnography-measured sleep duration with suicidal ideation and attempts

To assess the association of insomnia phenotypes, being insomnia with short sleep duration (ISSD) and insomnia with normal sleep duration (INSD), with suicidality in a randomly selected population-based sample. Data were analyzed from the Penn State Adult Cohort. Participants (N = 1741, 52.5 years, 57.4% female) were randomly recruited from the general population between January 1990 through March 1999 and mortality data were available through December 2018. Insomnia symptoms were defined as self-reports of moderate-to-severe difficulties initiating or maintaining sleep, early morning awakening and non-restorative sleep, or having chronic insomnia (n = 719). Short sleep duration was defined as