West Lafayette, IN (February 8, 2018) — A preliminary study led by researchers in the Purdue University College of Veterinary Medicine has shown that overall symptoms of post-traumatic stress disorder are lower among war veterans with service dogs. The pilot study was co-funded by the Human Animal Bond Research Institute (HABRI) and Bayer Animal Health.
The study was led by Maggie O’Haire, assistant professor of human-animal interaction, with the help of K9s For Warriors, an accredited non-profit organization that provides veterans with service dogs. The pilot research project provides scientific evidence of mental health benefits experienced by veterans with PTSD who have service dogs.
“We found that the group of veterans with service dogs had significantly lower levels of PTSD symptomology than those who did not have a service dog,” O’Haire says. “They also had lower levels of depression, lower anxiety and increased social participation, meaning a willingness to leave their house and go engage with society in different activities.” The study is published in the February issue of the Journal of Consulting and Clinical Psychology.
Participants were recruited between November 2015 and February 2016 from a national sample of 304 individuals who applied and were approved to receive a trained PTSD service dog from K9s For Warriors. Of these, 141 individuals chose to participate in the preliminary trial. Approximately half of the sample of participants were on the waitlist to receive a service dog and the other half already had a service dog.
Measurements of various aspects of PTSD symptoms, quality of life, social functioning and work were analyzed and compared between the two groups. Results reveal that veterans suffering from PTSD exhibited better mental health and well-being on several measures if they had a service dog, including:
- Lower overall symptoms of post-traumatic stress
- Lower levels of depression
- Higher levels of life satisfaction
- Higher overall psychological well-being
- Lower levels of social isolation and greater ability to participate in social activities
- Higher levels of resilience
- Higher levels of companionship
- Less absenteeism from work due to health among those who were employed
The only areas measured in which there was no significant difference between the two groups were physical functioning and employment status.
“This innovative study applied rigorous research methodology to an area that has historically been characterized by a reliance on anecdotal accounts and intuition rather than evidence-based science,” O’Haire says.
Kerri Rodriguez, human-animal interaction graduate student in the College of Veterinary Medicine, was co-author of the study.
“The results have important implications for understanding the specific areas of life that a PTSD service dog may help improve” says Rodriguez. “As the number of service dogs given to veterans with PTSD continues to increase, this is an important first step towards proof of concept that service dogs can actually provide measurable, clinical changes for veterans.” O’Haire and Rodriguez also say that service dogs did not replace evidence-based treatment for PTSD, nor did they cure it. While the veterans still had PTSD, they had significantly lower levels of symptoms.
“Pairing service dogs with our nation’s veterans should be recognized as a significant complementary method of treatment,” says HABRI Executive Director Steven Feldman. “The U.S. Department of Veterans Affairs has cited a lack of scientific research supporting service dogs for veterans with PTSD. This study is a significant step in providing scientific documentation, and I hope the promising results from this study will prompt a renewed focus on the benefits that service dogs provide.”
Bayer Animal Health Vice President for Companion Animal Product Marketing David Van Brunt says the lifetime bonds that these service dogs form with their veterans are built on mutual love, care and devotion. “The results of this study demonstrate not only the impact of this unbreakable bond, but that these service dogs are so much more than service dogs; they are able to bring the joy of living back into veterans’ lives. Bayer is committed to ensuring that these service dogs receive the proper and routine care they need to support their veteran on a daily basis,” Van Brunt says.
The research team will now move on to a National Institutes of Health-funded research project in which veterans with and without service dogs will be studied for an extended period of time. O’Haire says the valuable data from the pilot study helped secure the NIH R21 grant to conduct the large-scale, clinical trial to further investigate the efficacy and role of service dogs for military veterans with PTSD and their spouses.
Psychiatric service dogs are an emerging complementary treatment for military members and veterans with posttraumatic stress disorder (PTSD). Yet despite anecdotal accounts of their value, there is a lack of empirical research on their efficacy. The current proof-of-concept study assessed the effects of this practice.
A non-randomized efficacy trial was conducted with 141 post-9/11 military members and veterans with PTSD to compare usual care alone (n = 66) versus usual care plus a trained service dog (n = 75). The primary outcome was longitudinal change on the PTSD Checklist, including data points from a cross-sectional assessment and a longitudinal record review. Secondary outcomes included cross-sectional differences in depression, quality of life, and social and work functioning.
Mixed model analyses revealed clinically significant reductions in PTSD symptoms from baseline following the receipt of a service dog, but not while receiving usual care alone. Though clinically meaningful, average reductions were not below the diagnostic cutoff on the PTSD Checklist. Regression analyses revealed significant differences with medium to large effect sizes among those with service dogs compared to those on the waitlist, including lower depression, higher quality of life, and higher social functioning. There were no differences in employment status but there was lower absenteeism due to health among those who were employed.
The addition of trained service dogs to usual care may confer clinically meaningful improvements in PTSD symptomology for military members and veterans with PTSD, though does not appear to be associated with a loss of diagnosis.
Dr. Maggie O’Haire
More Press Releases
IDEXX Supports Human-Animal Bond Research
The Human Animal Bond Research Institute (HABRI) announced today that IDEXX Laboratories, Inc. has become an official supporter of HABRI and its research on the human health benefits of companion animals. “IDEXX is proud to support HABRI and its mission to advance human-animal bond research,” said Jonathan Ayers, Chairman and CEO of IDEXX Laboratories. “IDEXX is committed to enhancing the health and well-being of pets and people alike by bringing to market the most advanced diagnostics and software in veterinary medicine. When we provide high quality care for pets, human health also benefits.” “IDEXX is an innovative leader in pet health,” said Steven Feldman, Executive Director of HABRI. “By supporting HABRI, IDEXX is demonstrating its dedication to the human-animal bond and to keeping pets and people healthy together.” Scientific evidence increasingly shows that pets improve heart health; alleviate depression; increase well-being; support child health and development; and contribute to healthy aging. In addition, companion animals can assist in the treatment of a broad range of conditions from post-traumatic stress to Alzheimer’s disease to autism spectrum disorder. The benefits of the human-animal bond impact more than just human health. Findings from a recent HABRI survey of 2,000 pet owners demonstrate that knowledge of the scientific research on the human-animal bond motivates pet owners to take better care of their pets. From providing pets with higher quality nutrition to more frequent visits to the veterinarian, spreading awareness of the health benefits of pet ownership improves pet health and welfare.
Treat Planet Supports Human-Animal Bond Research
The Human Animal Bond Research Institute (HABRI) announced today that Treat Planet, makers of natural, eco-friendly pet products, has become an official supporter of HABRI and its research on the human health benefits of companion animals. “As makers of the best darn treats on the planet, Treat Planet provides man’s best friend with the best quality nutrition to keep them healthy and happy,” said Doug Martin, President of Treat Planet. “HABRI’s research shows that by maintaining a pet’s health, pet owners can improve their own health and well-being. Through supporting HABRI, Treat Planet is now advancing the human-animal bond through scientific research and quality nutrition, and we couldn’t be more proud.” “Recent HABRI research found that when educated about the health benefits of the human-animal bond, pet owners are more likely to provide their pets with higher quality nutrition, including treats,” said Steven Feldman, Executive Director of HABRI. “Not only is Treat Planet furthering its own mission through joining other leading companies and organizations from the pet care community that support HABRI, but it’s also contributing to a broader purpose of ensuring that more people can improve their health and quality of life through pet ownership.” Scientific evidence increasingly shows that pets improve heart health; alleviate depression; increase well-being; support child health and development; and contribute to healthy aging. In addition, companion animals can assist in the treatment of a broad range of conditions from post-traumatic stress to Alzheimer’s disease to autism spectrum disorder. The benefits of the human-animal bond impact more than just human health. Findings from a recent HABRI survey of 2,000 pet owners demonstrate that knowledge of the scientific research on the human-animal bond motivates pet owners to take better care of their pets. From providing pets with higher quality nutrition to more frequent visits to the...
New Coalition to Support Legislation Protecting Victims of Domestic Violence and Their Pets
A group of nonprofit and for-profit organizations have joined forces to better protect domestic violence survivors by establishing, validating and promoting the criticality of protecting their pets, too. This coalition is urging passage of the Pet and Women Safety (PAWS) Act (H.R. 909, S.322), a bill that is adamant about removing a roadblock that is essential to the safety of these survivors with pets, enabling them to live healthy, safe lives, together. Organizations in the coalition include: Nestle Purina PetCare Bayer Corporation Human Animal Bond Research Institute (HABRI) Noah’s Animal House Pet Partners Urban Resource Institute Two of these organizations, Noah’s Animal House and Urban Resource Institute are just a couple of the only 3% of domestic violence shelters across the country who are working to keep both pets and their owners away from the dangers of domestic abuse. Together these two incredible organizations have saved more than 1,500 pets from abusive conditions, so that no domestic violence survivor is forced to choose between staying in an abusive relationship and leaving their pet with their abuser. “Up to 65% of domestic violence victims remain in abusive homes out of fear for their pet’s safety, and even more women residing in domestic violence shelters reported that a pet was harmed by their abuser,” said URI President and CEO Nathaniel Fields. “Through the Urban Resource Institute’s innovative People and Animals Living Safely (PALS) program, domestic violence survivors in New York City are able to find safe harbor with their pets in one of our dedicated shelters. PALS is the largest and only model of its kind in New York State, and this new coalition will help extend that life-saving, pet-inclusive approach to domestic violence shelters across America.” Did you know? Up to 65% of domestic violence victims remain in abusive situations out of fear for their pets’ safety[i]. According to the Centers for Disease Control, 4,774,000...