A diagnosis of PTSD in male active-duty Marines was significantly associated with lower levels of high-frequency heart rate variability (β = -0.20, p = 0.035), independent of TBI and depression.
Cross-Sectional (n=2,430)
Is lower heart rate variability associated with posttraumatic stress disorder in active-duty Marines?
Lower high-frequency heart rate variability is associated with PTSD in active-duty Marines, independent of traumatic brain injury and depression.
Effect estimate: β = -0.20
p-value: p=0.035
OBJECTIVE: Heart rate variability (HRV), thought to reflect autonomic nervous system function, is lowered under conditions such as posttraumatic stress disorder (PTSD). The potential confounding effects of traumatic brain injury (TBI) and depression in the relationship between HRV and PTSD have not been elucidated in a large cohort of military service members. Here we describe HRV associations with stress disorder symptoms in a large study of Marines while accounting for well-known covariates of HRV and PTSD including TBI and depression. METHODS: Four battalions of male active-duty Marines (n = 2430) were assessed 1 to 2 months before a combat deployment. HRV was measured during a 5-minute rest. Depression and PTSD were assessed using the Beck Depression Inventory and Clinician-Administered PTSD Scale, respectively. RESULTS: When adjusting for covariates, including TBI, regression analyses showed that lower levels of high-frequency HRV were associated with a diagnosis of PTSD (β = -0.20, p = .035). Depression and PTSD severity were correlated (r = 0.49, p < .001); however, participants with PTSD but relatively low depression scores exhibited reduced high frequency compared with controls (p = .012). Marines with deployment experience (n = 1254) had lower HRV than did those with no experience (p = .033). CONCLUSIONS: This cross-sectional analysis of a large cohort supports associations between PTSD and reduced HRV when accounting for TBI and depression symptoms. Future postdeployment assessments will be used to determine whether predeployment HRV can predict vulnerability and resilience to the serious psychological and physiological consequences of combat exposure.
Minassian et al. (Thu,) conducted a cross-sectional in Posttraumatic stress disorder (PTSD) (n=2,430). Posttraumatic stress disorder (PTSD) vs. Controls (no PTSD) was evaluated on High-frequency heart rate variability (β = -0.20, p=0.035). A diagnosis of PTSD in male active-duty Marines was significantly associated with lower levels of high-frequency heart rate variability (β = -0.20, p = 0.035), independent of TBI and depression.