Reports an error in "An intensive outpatient program with prolonged exposure for veterans with posttraumatic stress disorder: Retention, predictors, and patterns of change" by Sheila A. M. Rauch, Carly W. Yasinski, Loren M. Post, Tanja Jovanovic, Seth Norrholm, Andrew M. Sherrill, Vasiliki Michopoulos, Jessica L. Maples-Keller, Kathryn Black, Liza Zwiebach, Boadie W. Dunlop, Laura Loucks, Brittany Lannert, Monika Stojek, Laura Watkins, Mark Burton, Kelsey Sprang, Lauren McSweeney, Katie Ragsdale and Barbara O. Rothbaum (Psychological Services, 2021[Nov], Vol 18[4], 606-618). In the original article, in the second sentence of the paragraph under "Baseline to Post-Treatment Change in Symptoms" in the Results section, changes were needed to match the information given in Table 3. The sentence "Posttreatment scores were not available for 11 of the 77 completers on the PCL-5 and one of the 77 completers on the PHQ-9 due to administrations error, so baseline to posttreatment change in PCL-5 was calculated based on 68 veterans and for the PHQ-9 on 76 patients" should have said "Posttreatment scores were not available for 9 of the 77 completers on the PCL-5 due to administrations error, so baseline to posttreatment change in PCL-5 was calculated based on 68 veterans. N = 77 for all other measures." These changes do not alter the conclusions of this article. The online version of this article has been corrected. (The following abstract of the original article appeared in record 2020-50253-001). High rates of drop-out from treatment of PTSD have challenged implementation. Care models that integrate PTSD focused psychotherapy and complementary interventions may provide benefit in retention and outcome. The first 80 veterans with chronic PTSD enrolled in a 2-week intensive outpatient program combining Prolonged Exposure (PE) and complementary interventions completed symptom and biological measures at baseline and posttreatment. We examined trajectories of symptom change, mediating and moderating effects of a range of patient characteristics. Of the 80 veterans, 77 completed (96.3%) treatment and pre- and posttreatment measures. Self-reported PTSD (p < .001), depression (p < .001) and neurological symptoms (p < .001) showed large reductions with treatment. For PTSD, 77% (n = 59) showed clinically significant reductions. Satisfaction with social function (p < .001) significantly increased. Black veterans and those with a primary military sexual trauma (MST) reported higher baseline severity than white or primary combat trauma veterans respectively but did not differ in their trajectories of treatment change. Greater cortisol response to the trauma potentiated startle paradigm at baseline predicted smaller reductions in PTSD over treatment while greater reductions in this response from baseline to post were associated with better outcomes. Intensive outpatient prolonged exposure combined with complementary interventions shows excellent retention and large, clinically significant reduction in PTSD and related symptoms in two weeks. This model of care is robust to complex presentations of patients with varying demographics and symptom presentations at baseline. (PsycInfo Database Record (c) 2023 APA, all rights reserved).