Thank you.
As the previous speakers did, I want to thank the committee and the subcommittee for giving attention to such an important topic.
First, I want to say that I am a recipient of competitive grants from numerous organizations, including the CIHR, Ontario Neurotrauma Foundation, Ontario Brain Institute, Brain Canada, Physicians' Services Incorporated, and the NFL, but I don't believe any of these poses a conflict of interest.
I want to introduce myself. My name is Roger Zemek. I'm a pediatric emergency physician in the Department of Pediatrics at the University of Ottawa. I'm a senior scientist at the clinical research unit and I lead the evidence to practice program at CHEO. I have a clinical research chair at the University of Ottawa in pediatric concussion through the Ottawa Brain and Mind Research Institute and I am the vice-chair of Pediatric Emergency Research Canada.
As for my own area of research in addition to being a clinician in the emergency department, my research focus is on the generation, application and knowledge translation of the best available evidence for concussion, bringing that evidence to the bedside as well. I have gotten more than than $4.3 million as the lead investigator on research and as a team member for more than $34 million in total concussion research funding.
One thing I'm very proud of is having been able to lead the team that has done the largest concussion study to date in the world. We did nine centres across Canada, with more than 3,000 children enrolled in the study. This study was the 5P study: Predicting Persistent Postconcussive Problems in Pediatrics.
I also have studied the epidemiology of concussion to examine the trends over the past decade. I lead a provincial randomized controlled trial of early physical activity, as mentioned in the Berlin guidelines—versus the previous guidelines of Zurich—to see which of those two rest protocols is more effective. I also led the first comprehensive concussion guidelines, through the ONF, for pediatrics. That had not only a health care provider version but was also the first to introduce a coach and teacher as well as a parent version.
I am part of Pam's team as a parachute content expert. As well, I was on the Berlin panel as one of the pediatric experts and was on one of the other teams also. I have presented to the National Institutes of Health in the United States, at Bethesda, sitting on some of their expert panels.
I am very proud to say that Canada is a world leader in concussion research. Of the 10 most-cited universities across the world with regard to concussion, Canada is home to four of these top 10. We truly are groundbreaking. If you were looking at the panel of scientists who presented at that Berlin meeting and who led many of those committees, Canada was definitely hitting above its punching weight.
I want to quickly highlight a few things with regard to my own research. Then I'm happy to delve into more detail on questions.
One thing is epidemiology. We've shown that in Ontario the number of emergency department and office visits for concussion has quadrupled over the last decade. That increase is most significant in adolescents, which showed a more than five-and-a-half-fold increase.
My study was of 3,000 patients across emergency departments in Canada. This was really getting children at their most acute times of injury. The average child was enrolled in less than three hours from the time of their injury to when they got into the study. We followed those children for more than three months. What we found was, and the good news is—there is good news—that most kids get better. About 30%, however, continue to have symptoms that persist beyond one month. I've gone over some of those factors that are predictive. I won't go into the details now.
We also know that while sport is an important cause of concussion, about 25% of all concussions and potentially even up to a third happen unrelated to sport. That is very important to keep in mind, because our athletes can still slip on the ice, can still have collisions in the hallways at school and be involved in motor vehicle collisions, and this can then affect their sport afterwards.
One thing our team did was talk about return to play and how those things have evolved. I'm proud to have led the team that found that early physical activity actually did lead to improved recovery over time. The concept of home jail, in which families interpreted “rest until asymptomatic” as keeping their children in dark rooms for periods of time, may actually have caused more potential harm than good. I'd be happy to talk later about finding the correct Goldilocks balances—not too hot, not too cold—and our finding the “just right” balance.
Last, one of the studies we did looked at the quality of life of children with concussion. While children with concussion improve in many aspects of quality of life, one of the things that remain very impactful compared to the average child is the impact on school. As a pediatrician, this is such an important factor. Even in those kids who have recovered, the school quality of life factors remained significantly decreased from healthy children for months on end, and that extends beyond three months.
I'm happy to have this opportunity to talk to the panel about something I am so passionate about trying to get to some answers for.