LAUSR

Illness beliefs are significant contributors to health outcomes. Beliefs about the cause of physical symptoms are considered particularly important among those with medically unexplained symptoms and illnesses (MUS); yet little is known about causal beliefs among those with the most severe MUS (i.e., Veterans). The goal of the current study was to examine Veteran's causal attributions of their physical symptoms. A total of 91 combat Veterans with MUS were surveyed using a mixed-methods design about the cause of their physical symptoms, physical symptom severity, and PTSD symptoms. Causal attributions of physical symptoms were analyzed through thematic response analysis and grouped into categories. Chi-square analysis was used to assess the distribution of causal attribution types across Veterans with varying physical symptom severity and PTSD symptom severity. Veterans with MUS reported an average of 7.9 physical symptoms, and attributed the cause of their symptoms to seven different categories (“Do not Know,” “Stress/Mental Health,” “Deployment/Environment,” “Functional/Symptom,” “Medically Explained,” “Medically Unexplained Syndrome,” and “Lifestyle”). Exploratory chi-square analysis revealed significant differences in causal attributions across physical symptom severity and severity of PTSD symptoms. Veterans with more severe PTSD and Veterans with more severe physical symptoms were more likely to attribute their MUS to stress/mental health or to a medically unexplained syndrome compared with those with low/no PTSD symptoms and physical symptom severity. Veterans with minimal PTSD and Veterans with minimal physical symptom severity were more likely to attribute the cause of their MUS to lifestyle choices (e.g., exercise/diet) compared with those with high PTSD and physical symptom severity. Veterans with MUS endorse multiple, varied causal attributions for their physical symptoms, suggesting more complex causal beliefs than typically assumed. This has important implications for patient-provider communication and development of concordance around MUS treatment.