Psychiatric service dogs are an emerging complementary intervention for veterans and military members with posttraumatic stress disorder (PTSD). Recent cross-sectional studies have documented significant, clinically relevant effects regarding service dogs and PTSD symptom severity. However, these studies were conducted using the PTSD Checklist (PCL) for the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM). The present study aimed to replicate and advance these findings using the latest version of the PCL for the fifth edition of the DSM (PCL-5). Participants included 186 military members and veterans who had received a PTSD service dog (n = 112) or who were on the waitlist to receive one in the future (n = 74). A cross-sectional design was used to investigate the association between having a service dog and PCL-5 total and symptom cluster scores. After controlling for demographic variables, there was a significant association between having a service dog and lower PTSD symptom severity both in total, B = -14.52, p < .001, d = -0.96, and with regard to each symptom cluster, ps < .001, ds = -0.78 to -0.94. The results replicated existing findings using the largest sample size to date and the most recent version of the PCL. These findings provide additional preliminary evidence for the efficacy of service dogs as a complementary intervention for military members and veterans with PTSD and add to a growing body of foundational research serving to rationalize investment in the further clinical evaluation of this emerging practice.
© 2020 International Society for Traumatic Stress Studies.