A Pilot Replication Study of Implementing an Equine-Assisted Services Program Within a VA Residential Substance Use Disorder Treatment Program.

INTRODUCTION: Veterans have high rates of substance use disorders and other mental health conditions including post-traumatic stress disorder. Effective treatments for these conditions exist; however, high attrition rates and residual symptoms after completing treatment are common. Complementary treatment approaches could enhance treatment engagement and/or response among this population. We previously reported a study of one such intervention, an equine-assisted learning, and psychotherapy incorporating horses intervention provided to veterans admitted to a Veterans Health Care Administration residential substance abuse treatment program. The first aim of this study was to replicate the previous study assessing the safety, feasibility, and preliminary outcomes of this intervention. The second aim was to examine the effect of participants attending multiple intervention sessions. MATERIALS AND METHODS: Participants were 94 veterans who participated in one to six sessions of a 3-4-hour program consisting of both equine-assisted learning and psychotherapy incorporating horses. Pre- and post-session administration of the Positive and Negative Affect Scale, State-Trait Anxiety Inventory, and Craving Experience Questionnaire was utilized to assess changes in affect, anxiety, and craving. Wilcoxon signed-rank or paired two-tailed t-tests were utilized for pre- to post-session comparisons of the outcome measures for sessions 1-4. Generalized linear mixed-effects (GLME) models were constructed to determine the impact of dosage. GLME models were constructed to determine the impact of dosage. RESULTS: As with our previous study, the intervention was safe and feasible to utilize for this population. There were statistically significant pre- to post-session improvements, with medium-to-large effect sizes, for sessions 1-3 for negative affect and sessions 1 and 2 for positive affect, anxiety, and craving. The GLME models revealed no statistical significance for any of the predictors. CONCLUSIONS: Taken together, this study and our previous investigation of this equine-assisted services intervention suggest that it is safe and feasible to utilize for veterans admitted to a residential substance abuse treatment program and we have now found short-term benefits in two separate studies. Thus, a randomized controlled trial of this intervention is warranted to demonstrate cause and effect and determine whether longer-term benefits are associated with the intervention. The finding that there was no additional benefit from attendance at more than two intervention sessions suggests that dose-response relationship studies of equine-assisted services interventions for veterans are needed.

A pilot observational study of horsemanship skills training for veterans with posttraumatic stress disorder.

OBJECTIVES: Pilot assessment of an equine-assisted services intervention for Veterans with posttraumatic stress disorder. DESIGN: Prospective cohort. SETTING: A large Veterans Administration healthcare system. INTERVENTION: Two sessions of instruction in horsemanship skills and two sessions of trail rides. MAIN OUTCOME MEASURES: Safety and feasibility of recruitment, retention, providing the intervention, and measuring outcomes, as well as acceptability of the intervention to the population studied were the main outcome measures. RESULTS: There were no injuries among the 18 participants, 6 staff, or 11 equines over the 3 months of the study. Eleven of 12 (92 %) planned intervention sessions were provided, with one being canceled due to weather. Out of approximately 1800 potential subjects, 21 were enrolled within three months and three dropped out before the first session. The mean number of sessions attended was 3 % and 52 % of participants completed all sessions. The mean PACES score for all sessions together was 109 (SD = 12), with a range of 50-126. Pre- to one-month post-intervention exploratory results indicated increased psychological flexibility (p = 0.008) and positive affect (p = 0.008) as measured by the Acceptance and Action Questionnaire II and the Positive and Negative Affect Scale, respectively as well as decreased PTSD (p = 0.001) and depressive symptoms (p = 0.017) as measured by the PTSD Checklist for DSM 5 and the Beck Depression Inventory, respectively. CONCLUSIONS: Results suggest the intervention can be conducted with minimal risk. Further, it was feasible to recruit participants as well as provide the intervention and measure exploratory outcomes. Session attendance and PACES scores indicate acceptability to the Veteran population. The exploratory results will provide sample size estimates for future randomized controlled studies of this intervention Future studies should plan for missed sessions due to weather and consider compensating subjects to enhance retention. Finally, this work provides preliminary evidence that this intervention, without a mental health treatment component, might benefit the mental health of Veterans with PTSD.

A pilot observational study of recreational trail riding for Veterans with addictive disorders.

OBJECTIVES: The aim of study was to assess the safety, feasibility, and preliminary outcomes of recreational trail riding for Veterans with addictive disorders. DESIGN: This was an observational pilot study. SETTING: United States Veterans Health Care Administration Medical Center. Participants were 18 Veterans, 13 males and 5 females All had at least one addictive disorder, with most common being alcohol use disorder. INTERVENTION: A recreational trail ride of approximately two hours duration. MAIN OUTCOME MEASURES: Assessment of safety and pre- and post-intervention instruments, The State-Trait Anxiety Inventory, Craving Experience Questionnaire, Positive and Negative Affect Scale and Conner-Davidson Resilience Scale were utilized to assess changes in anxiety, craving, affect, and resilience, respectively. RESULTS: The intervention was feasible to utilize for the population studied. In addition, it was possible to conduct the rides in such a way as to minimize risk to participants and there were no serious adverse outcomes to patients, staff, or equines. However, there was one incident that had potential to cause injury. There were significant pre- to post-intervention decreases in anxiety, negative affect and craving as well as increased positive affect. There was not a statistically significant increase in resilience. CONCLUSIONS: These results indicate that recreational trail riding is, at least in some settings, feasible to utilize for this population. The safety assessment indicated that this intervention can be conducted in a manner such that risk can be mitigated. However, trail riding is a dangerous activity that can result in serious injury or death to participants. Thus, such activities should only be considered by programs that have the ability to implement stringent safety protocols. Preliminary outcomes suggest that this intervention has the potential to be beneficial to for Veterans with addictive disorders. Additional, more rigorous randomized, controlled studies are warranted.