The influence of posttraumatic stress disorder treatment on anxiety sensitivity: Impact of prolonged exposure, sertraline, and their combination

Trauma-informed beliefs often decrease during posttraumatic stress disorder (PTSD) treatment. This may also extend to anxiety sensitivity (AS), defined as a fear of anxiety-related sensations and beliefs that anxiety is dangerous and/or intolerable. However, little is known about how AS changes during exposure-based and psychopharmacological PTSD treatments. Further, high AS may be a risk factor for diminished PTSD symptom improvement and increased treatment dropout. To better understand how AS impacts and is impacted by PTSD treatment, we conducted a secondary analysis of a randomized clinical trial with a sample of 223 veterans (87.0% male, 57.5% White) with PTSD from four U.S. sites. Veterans were randomized to receive prolonged exposure (PE) plus placebo (n = 74), sertraline plus enhanced medication management (n = 74), or PE plus sertraline (n = 75). Veterans answered questions about PTSD symptoms and AS at baseline and 6-, 12-, 24-, 36-, and 52-week follow-ups. High baseline AS was related to high levels of PTSD severity at 24 weeks across all conditions, beta = .244, p = .013, but did not predict dropout from exposure-based, beta = .077, p = .374, or psychopharmacological therapy, beta = .009, p = .893. AS also significantly decreased across all three treatment arms, with no between-group differences; these reductions were maintained at the 52-week follow-up. These findings suggest that high AS is a risk factor for attenuated PTSD treatment response but also provide evidence that AS can be improved by both PE and an enhanced psychopharmacological intervention for PTSD.