In law enforcement, a survey finds a link between head injuries and depression, PTSD

A new study is the first to shed light on the high prevalence of head injuries, and related mental health symptoms, in a previously overlooked population when it comes to concussion surveillance: law enforcement officers.

The survey of Ohio law enforcement officers found that 74% reported a lifetime history of one or more head injuries, and 30% had a head injury that happened on the job. Many more of these injuries went unreported than were treated by a health care professional. And further analysis showed post-traumatic stress disorder and depressive symptoms were higher in those who had experienced one or more head injuries.

"This is an area where we have to improve awareness, just like we did in the sport concussion world," said lead author Jaclyn Caccese, Ph.D., assistant professor in the School of Health and Rehabilitation Sciences at The Ohio State University Wexner Medical Center.

"The goal is really to improve officer safety and health in the long term," said Caccese, also an investigator in Ohio State's Chronic Brain Injury Program.

"And I think there's a lot of potential there, especially when it comes to improving career longevity—that although treating these injuries is difficult in the moment, it leads to a longer career, better health outcomes and better quality of life, not only in their service, but also in retirement. I think with that awareness, they will be more likely to report injuries as they sustain them."

The study is published Aug. 5, 2024, in the Journal of Head Trauma Rehabilitation.

The medical and law enforcement researchers who co-authored the study have published a separate paper, in the Journal of Athletic Training, advocating for implementation of a concussion return-to-duty protocol for law enforcement officers—similar to practices already in place in sports and the military.

The researchers surveyed 381 law enforcement personnel in central Ohio about their lifetime head injury history, years of service in the military and civilian law enforcement, and rank and section assignment (such as patrol, corrections or administration). The participants also completed questionnaires assessing symptoms of PTSD and depression.

Of those respondents, 282 reported one or more prior head injuries, mostly from sports, followed by such incidents as falling or being hit by something or someone, a car accident, or exposure to a blast. Over 50% of participants reported head injuries involving loss of consciousness or followed by feeling dazed or confused, or having a gap in memory—all signs of a probable traumatic brain injury (TBI). A concussion is considered a mild TBI.

Some 9% of total respondents screened positive for PTSD symptoms and 36% reported mild or greater depressive symptoms. Participants with a prior head injury reported higher symptoms for both conditions. Researchers estimated that fewer than one in four head injuries was diagnosed or treated by a health care provider.

Caccese said researchers are still learning about the long-term effects of concussions, but current evidence suggests head injuries that go untreated may increase risk for depression, anxiety, PTSD and problems with cognitive function and memory.

For law enforcement officers, concussions often occur in the heat of their job. The stress associated with the role and poor sleep from shift work are also common in this population. The circumstances can contribute to worse outcomes following a head injury.

"Sometimes law enforcement officers need to complete the task they've set out to do, or it's not a safe environment to just pull yourself off duty right away. And I think adrenaline sometimes masks concussion symptoms," Caccese said.

"In sports, we've been able to increase removal from play, and improve rehabilitation and return-to-play following injury. Hopefully, that will improve long-term health outcomes in athletes. We're trying to get that information translated to the occupational context."

Study co-author Josh Walters, a deputy in the Franklin County, Ohio, Sheriff's Office, leads his office's peer support team of deputies certified to work with personnel experiencing a range of problems. Teaming up for the study of head injuries and their association with PTSD and depressive symptoms grew out of the peer group's long-term partnership with Ohio State researchers and clinicians to enhance deputy health with physical therapy, sleep studies and concussion-related training.

"Part of what we're doing with Ohio State is looking at, how can we extend the health of the deputy?" Walters said.

"Being physically fit is an important part of our job because not only do my colleagues depend on me, but the community depends on me. And if I can't physically keep up, then it could be a life-or-death situation for somebody."

The next step is working to adopt the return-to-duty protocol proposed by the team—removal from duty, a gradual increase in activity, and screening by a medical provider before returning to full duty—and testing its effectiveness and adaptability to different organizations.

"Now we have some data that we can present to administrations, to unions, to leadership that says, 'Here's the problem. This is how we can fix it. Let's start working that process,'" Walters said.