Biological and psychological predictors of posttraumatic stress disorder onset and chronicity. A one-year prospective study

• Main Authors: C. Gandubert, J. Scali, M-L. Ancelin, I. Carrière, A-M. Dupuy, G. Bagnolini, K. Ritchie, M. Sebanne, L. Martrille, E. Baccino, A. Hermès, J. Attal, I. Chaudieu
• Format: Article
• Language: English
• Published: Elsevier 2016-06-01
• Series: Neurobiology of Stress
• Subjects: Cortisol; Norepinephrine; Peritraumatic reaction; PTSD; Waist-to-hip-ratio
• Online Access: http://www.sciencedirect.com/science/article/pii/S2352289515300163

Background: Few studies have prospectively examined risk factors for posttraumatic stress disorder (PTSD) in the aftermath of a traumatic exposure. The aim of this study is to identify the concurrent influence of psychological and biological diatheses on PTSD onset and maintenance, taking into account socio-demographic factors and psychiatric antecedents. Methods: A total of 123 civilians (61.8% of women) recruited in emergency units, were assessed using validated instruments during the first week and then at 1, 4, and 12 months post-trauma. Baseline assessment included evaluation of the psychological diathesis (i.e. psychiatric history and peritraumatic distress and dissociation), and the biological diathesis [i.e. cortisol, norepinephrine, epinephrine, c-reactive protein, total cholesterol, HDL cholesterol, glycosylated haemoglobin, waist-to-hip ratio (WHR), body mass index, diastolic and systolic blood pressure (SBP), and heart rate]. Results: Multivariate logistic regression analyses demonstrated both psychological and biological diatheses to be independent risk factors for PTSD. Peritraumatic distress and dissociation predicted onset (1-month) and mid-term PTSD (4-months), respectively. PTSD risk was associated positively with SBP and negatively with WHR, throughout the follow-up. In addition, a higher level of 12 h-overnight urinary norepinephrine independently predicted mid-term PTSD (4-months). Conclusions: This prospective study shows that peritraumatic psychological and biological markers are independent predictors of PTSD onset with specificities according to the stage of PTSD development; the psychological diathesis, i.e. peritraumatic distress and dissociation, being a better predictor of short-term dysfunction whereas biological diathesis was also predictive of development and maintenance of PTSD.