Differences in protective factors among U.S. Veterans with posttraumatic stress disorder, alcohol use disorder, and their comorbidity: Results from the National Health and Resilience in Veterans Study

Abstract

Background: Comorbid posttraumatic stress disorder (PTSD) and alcohol use disorder (AUD) are associated with greater clinical and functional impairments than either disorder alone, including higher rates of suicidality and reduced functioning and quality of life. Although PTSD/AUD is associated with more severe risk factors relative to either disorder alone, it is unclear whether PTSD/AUD and its related impairments are also associated with lower levels of protective factors.

Methods: We examined two composite factors of protective qualities derived from exploratory factor analyses-social connectedness (i.e., structural social support, perceived social support, secure attachment style) and protective psychosocial characteristics (i.e., resilience, purpose in life, dispositional optimism and gratitude, and community integration), in a nationally representative sample of U.S. Veterans (using data from the National Health and Resilience in Veterans Study) with PTSD alone, AUD alone, and comorbid PTSD/AUD.

Results: Veterans with PTSD and PTSD/AUD scored significantly lower than those with AUD alone but did not differ from each other on measures of social connectedness and protective psychosocial characteristics (ps < .001). Both factors partially mediated the relationship between diagnostic status (PTSD or PTSD/AUD vs. AUD alone) and suicidal ideation (ORs = 0.58-0.62), as well as between diagnostic status and functioning/quality of life (psychosocial protective characteristics, β = 0.39; social connectedness, β = 0.16). Only protective psychosocial characteristics (OR = 0.54) emerged as a partial mediator between diagnostic status and lifetime suicide attempts.

Conclusions: U.S. Veterans with PTSD and PTSD/AUD score lower on measures of protective factors than Veterans with AUD. These factors may be important targets for prevention and treatment efforts.

Keywords: Alcohol use disorder; Comorbidity; Posttraumatic stress disorder; Protective factors; Quality of life; Suicidality.