Insomnia Treatment and Cardiometabolic Health in Older Adults With Posttraumatic Stress Disorder

Inclusion Criteria: * Community-dwelling Veterans aged 50 years and older * Received care from a Veterans Health Administration (VHA) facility in the prior year * Diagnosis of PTSD * Diagnosis of insomnia disorder * Lives within a 50-mile radius of the research offices at the VA Sepulveda Ambulatory Care Center Exclusion Criteria: * Active substance use or in recovery with less than 90 days of sobriety * Too ill to engage in the study procedures (e.g., unable to attend the in-person meetings) * Unable to self-consent to participate * Unstable housing (as this will impact the research team's ability to retrieve costly and difficult to replace monitoring equipment) * Severe cardiovascular or respiratory disease (e.g., ventilatory failure, CHF) * Unstable medical or psychiatric disorders (which are a contraindication for behavioral treatment of insomnia) * Comorbid sleep disorders (i.e., central sleep apnea syndrome, diagnosed narcolepsy or circadian rhythm sleep-wake phase disorders) based on medical record review and baseline assessment data, or untreated, severe sleep disordered breathing (SDB) as assessed via WatchPAT or previous clinical evaluation (apnea-hypopnea index \[AHI\] ≥ 30; or AHI ≥ 15 plus Epworth Sleepiness Scale \[ESS\] score ≥ 10) that better explain sleep difficulties