The Prevalence of Depression and Concussions in a Sample of Active North American Semi-Professional and Professional Football Players

Mood Disorders in the Wake of Traumatic Brain Injury: A Systematic Review

Traumatic brain injury (TBI) frequently leads to a myriad of long-term consequences, among which mood disorders present a significant challenge. This systematic review delves into the complex interplay between TBI and subsequent mood disorders, focusing on research studies conducted over the past decade. Encompassing an age range from 12 years old to older adults (60+ years), our review aims to elucidate the epidemiological patterns, neurobiological mechanisms, and psychosocial factors that contribute to the development of mood disorders following TBI. By synthesizing the current literature, we seek to uncover the prevalence and clinical implications of this often-under-recognized comorbidity. For the quality appraisal of the reviewed articles, the Newcastle-Ottawa risk-of-bias tool and Scale for the Assessment of Narrative Review Articles (SANRA) checklist were employed. Ultimately, this review endeavors to provide a comprehensive understanding of the intricate relationship between TBI and mood disorders, offering insights crucial for improved management and intervention strategies in affected individuals.

Social Support, Stress, and Mental Health: Examining the Stress-Buffering Hypothesis in Adolescent Football Athletes

CONTEXT

Football sport participation has been linked to both positive and negative effects on overall health. Social support, a network that provides individuals with resources to cope effectively, may positively influence one's stress and mental health. However, little research has been conducted on adolescent football players.

OBJECTIVE

To examine the relationships among social support, psychological stress, and mental health in adolescent football athletes.

DESIGN

Cross-sectional study.

SETTING

High school athletes during the precompetitive and postcompetitive football season in rural Alabama.

PATIENTS OR OTHER PARTICIPANTS

Black and African American adolescent athletes (N = 93) competing for a school-sponsored football team.

MAIN OUTCOME MEASURE(S)

After a competitive season, participants completed a battery of social support, psychological stress, and mental health symptom measures using the National Institutes of Health Toolbox Application and Patient-Reported Outcomes Measurement Information System. The T-score means, Pearson correlations, and multiple regression analyses were calculated.

RESULTS

Social support was negatively correlated with psychological stress (emotional support, r = -0.386; family relationships, r = -0.412; peer relationships, r = -0.265) and mental health (depression, r = -0.367 and r = -0.323 for emotional support and family relationships, respectively), whereas psychological stress and mental health (depression, r = 0.751; anxiety, r = 0.732) were positively correlated. In regression analyses, social support measures (ie, emotional support, family relationships, and peer relationships) were used to predict psychological stress (F = 7.094, P < .001, R2 = 0.191), depression symptoms (F = 5.323, P < .001, R2 = 0.151), and anxiety symptoms (F = 1.644, P = .190, R2 = 0.052).

CONCLUSIONS

In line with the stress-buffering hypothesis, social support in the form of family relationships and overall emotional support garnered through sport participation may reduce psychological stress and help to preserve the mental health of football athletes. These findings indicate that perceived social support may act as a positive resource for the coping of Black and African American adolescent athletes. Further research is warranted to understand the effects of stress and social support on the mental health of adolescents, particularly racial and ethnic minorities who are underrepresented in the athletic training literature.

Healthspan and chronic disease burden among young adult and middle-aged male former American-style professional football players

OBJECTIVE

To examine the relationships between age, healthspan and chronic illness among former professional American-style football (ASF) players.

METHODS

We compared age-specific race-standardised and body mass index-standardised prevalence ratios of arthritis, dementia/Alzheimer's disease, hypertension and diabetes among early adult and middle-aged (range 25-59 years) male former professional ASF players (n=2864) with a comparator cohort from the National Health and Nutrition Examination Survey and National Health Interview Survey, two representative samples of the US general population. Age was stratified into 25-29, 30-39, 40-49 and 50-59 years.

RESULTS

Arthritis and dementia/Alzheimer's disease were more prevalent among ASF players across all study age ranges (all p<0.001). In contrast, hypertension and diabetes were more prevalent among ASF players in the youngest age stratum only (p<0.001 and p<0.01, respectively). ASF players were less likely to demonstrate intact healthspan (ie, absence of chronic disease) than the general population across all age ranges.

CONCLUSION

These data suggest the emergence of a maladaptive early ageing phenotype among former professional ASF players characterised by premature burden of chronic disease and reduced healthspan. Additional study is needed to investigate these findings and their impact on morbidity and mortality in former ASF players and other athlete groups.

Feasibility of Predicting In-Season Mental Health Problems in College Student-Athletes From Pre-season Assessment

OBJECTIVE

To examine whether pre-season assessment using a validated assessment tool, the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF), could predict college student-athletes identified as experiencing in-season mental health (MH) problems.

DESIGN

A prospective study of athletes who completed a pre-season evaluation in August 2018.

SETTING AND PARTICIPANTS

A total of 195 National Collegiate Athletic Association Division 1 student-athletes from a large midwestern university in northeast Ohio.

INDEPENDENT VARIABLE

The MMPI-2-RF, a 338-item self-report measure of constructs relevant to the assessment of psychopathology and personality.

MAIN OUTCOME MEASURE

Mental health problems of student-athletes tracked throughout the competitive season (August 2018-May 2019) by a team of athletic department personnel who met weekly with a licensed clinical psychologist.

RESULTS

In pre-season assessment, 71.8% of athletes clinically elevated at least one MMPI-2-RF scale and underreporting was higher in student-athletes than normative controls. Pre-season levels of internalizing psychopathology, diffuse physical symptoms, and unusual thoughts predicted increased likelihood of experiencing MH problems during the competitive season.

CONCLUSIONS

The current findings suggest that the MMPI-2-RF may be a promising tool for identifying student-athletes at risk for MH concerns.

Tactical Masters Athletes: BMI Index Classifications

Understanding the nexus between aging, physical activity, and obesity has been a source of ongoing investigation. A considerable amount of research has focused on Masters athletes in this regard, suggesting a beneficial relationship between Masters sport participation and a healthy body mass index (BMI). Some consider Active Duty military personnel as tactical athletes. As such, it is of interest to determine if aging Active Duty military personnel (or Masters Tactical Athletes) might have a similar BMI as other Masters athletes (MA). As such, this investigation examined previously recorded data of Active Duty Enlisted United States Marines (n = 402, male, 46–50 years old). The BMI of the Marines was stratified into categories of: underweight, normal, overweight, and obese. The Marines obesity prevalence was compared to US adult males (40–59 years) as well as male North American MA who competed at the 2009 Sydney World Masters Games. The Marines obesity prevalence was significantly lower than US adult males (p < 0.001) and those MA that competed in softball (p < 0.001); however, it was similar to MA that competed in football, track/field, swimming, and volleyball (p > 0.05). The average Marine BMI = 26.7 kg/m2 was similar to MA who competed in football, swimming, and volley ball (p > 0.05); however, it was higher than MA who competed in track/field (p < 0.05) and lower than MA who played softball (p < 0.05). It should be noted that the average BMI for the Marines and all MA sport categories were classified as being overweight. Within the parameters of this investigation, Tactical MA (i.e., aging US Marines) enjoy a similar beneficial BMI as other North American MA.

A Role for the Amygdala in Impairments of Affective Behaviors Following Mild Traumatic Brain Injury

Mild traumatic brain injury (TBI) results in chronic affective disorders such as depression, anxiety, and fear that persist up to years following injury and significantly impair the quality of life for patients. Although a great deal of research has contributed to defining symptoms of mild TBI, there are no adequate drug therapies for brain-injured individuals. Preclinical studies have modeled these deficits in affective behaviors post-injury to understand the underlying mechanisms with a view to developing appropriate treatment strategies. These studies have also unveiled sex differences that contribute to the varying phenotypes associated with each behavior. Although clinical and preclinical studies have viewed these behavioral deficits as separate entities with unique neurobiological mechanisms, mechanistic similarities suggest that a novel approach is needed to advance research on drug therapy. This review will discuss the circuitry involved in the expression of deficits in affective behaviors following mild TBI in humans and animals and provide evidence that the manifestation of impairment in these behaviors stems from an amygdala-dependent emotional processing deficit. It will highlight mechanistic similarities between these different types of affective behaviors that can potentially advance mild TBI drug therapy by investigating treatments for the deficits in affective behaviors as one entity, requiring the same treatment.

The prevalence of depressive symptoms in high-performance athletes: a systematic review

Objective: To provide an up-to-date overview of the prevalence of depressive symptoms in high-performance athletes and describe the tools used to assess for these in order to identify knowledge gaps and potential future research priorities. Data sources: PubMed, EMBASE, SPORTDiscus, PsychINFO, and Cochrane were systematically searched from December 1993 to December 2018. Peer-reviewed original research articles reporting the prevalence of depression among high-performance athletes aged ≥ 17 years were included. Study selection: Sixteen studies satisfied the inclusion criteria, and seven had a low risk of bias. Data extraction: The Center for Epidemiologic Studies Depression Scale (CES-D) was the most commonly used tool to assess for depressive symptoms. The prevalence of those with high depression symptom cutoff scores ranged from 6.7% to 34.0%. Data synthesis: Higher levels of competition, injuries, > 3 concussions, and female sex were identified as potential risk factors for depression. Female athletes and athletes playing individual sports had high risk of having elevated depression symptom scores. Conclusions: Prevention of mental illness in high-performance sports is a novel and emerging field of research interest. This review highlights the prevalence of high depression symptom scores among high-performance athletes. The data collection methods, sample size, sport and athlete population, and tools used to assess depression vary across studies; thus, findings cannot be generalized. This review establishes the need for data collection enhancements with robust longitudinal study designs and standardized depression assessment tools to guide the development of evidence-based mental wellbeing interventions.

Association between Concussions and Suicidal Behaviors in Adolescents

While there is increasing evidence on the long-term risks associated with concussions, the association between hopelessness, suicidal ideation, suicidal planning, and suicidal attempts in high school aged adolescents has not yet been explored. The current study aims to estimate the association between concussions and suicidal behaviors in Utah high school students. We analyzed the 2013 Utah Youth Risk Behavior Survey (YRBS), a state, representative survey of 2,195 ninth through 12th grade high school students. Bivariate and multi-variate logistic regressions controlling for race/ethnicity, sex, grade, and alcohol use were conducted to evaluate the adjusted odds ratio (OR) and 95% confidence interval (CI) of suicidal behaviors comparing students exposed to one or more concussions with those unexposed. Students with self-reported concussion exposure had significantly greater odds of reporting feeling sad or hopeless (OR = 1.7; 95% CI 1.4, 2.2, suicidal ideations [adjusted odds ratio (AOR) = 2.0; 95% CI 1.4, 2.7], suicidal planning [AOR = 2.0; 95% CI 1.4, 2.8], and suicidal attempts [OR = 2.3; 95% CI 1.4, 3.7]) after controlling for grade, sex, race, and alcohol-use. Results from this study suggest that high school students who have had a concussion are more likely to report suicidal behaviors, compared with high school students who did not report a concussion. Given the results, concussion prevention education efforts in high schools are warranted. In addition, it is imperative to educate parents, teachers, and health professionals how to recognize a concussion and any possible mental health outcomes as a result. Future longitudinal research is needed to better understand temporality of this association.

Exploring the association between recent concussion, subconcussive impacts and depressive symptoms in male Australian Football players

Objectives

To explore the association between depressive symptoms and recent head-related trauma (diagnosed concussion, subconcussive impacts) in semiprofessional male Australian Football (AF) players.

Methods

Sixty-nine semiprofessional male players from a West Australian Football League (WAFL) club participated in the study (M_age=21.81, SD=2.91 years). Depressive symptoms were measured using the Centre for Epidemiological Studies Depression Scale. Injuries and potential confounding variables (eg, pre-existing mental health condition; alcohol or drug hangovers; experiencing a stressful event) were self-reported anonymously using the WAFL Injury Report Survey. Both tools were administered every 2-weeks over the first 22-weeks of the WAFL season. Controlling for potential confounding variables and other injuries, a repeated measures generalised estimating equations model assessed the risk of clinically relevant depressive symptoms occurring, when diagnosed concussion or subconcussive impacts were experienced.

Results

A total of 10 concussions and 183 subconcussive impacts were reported. Players who experienced a concussion were almost nine times more likely to experience clinically relevant depressive symptoms (OR 8.88, 95% CI 2.65 to 29.77, p<0.001). Although elevated, depressive symptoms following subconcussive impacts were not statistically significant (OR 1.13, 95% CI 0.67 to 1.92, p=0.641).

Conclusion

These findings indicate that semiprofessional AF athletes may be at risk of experiencing depressive symptoms after concussion. Severity (concussion vs subconcussive impacts) and dose (number of impacts) appear to have an important relationship with depressive symptom outcomes in this cohort and should be considered for further research and management of player welfare.

Exposure to American Football and Neuropsychiatric Health in Former National Football League Players: Findings From the Football Players Health Study

BACKGROUND

Former American football players have a higher prevalence of cognitive impairment than that of the US general population. It remains unknown what aspects of playing football are associated with neuropsychiatric outcomes.

HYPOTHESIS

It was hypothesized that seasons of professional football, playing position, and experience of concussions were associated with cognition-related quality of life (QOL) and indicators of depression and anxiety.

STUDY DESIGN

Descriptive epidemiology study.

METHODS

The authors examined whether seasons of professional football, playing position, and experience of concussions, as measured by self-report of 10 symptoms, were associated with cognition-related QOL and indicators of depression and anxiety in a cross-sectional survey conducted 2015 to 2017. Cognition-related QOL was measured by the short form of the Quality of Life in Neurological Disorders: Applied Cognition-General Concerns. The Patient Health Questionnaire-4 measured depression and anxiety symptoms. Of 13,720 eligible men with apparently valid contact information, 3506 players returned a questionnaire at the time of this analysis (response rate = 25.6%).

RESULTS

Seasons of professional play (risk ratio [RR] per 5 seasons = 1.19, 95% CI = 1.06-1.34) and playing position were associated with cognition-related QOL. Each 5 seasons of play was associated with 9% increased risk of indicators of depression at borderline statistical significance (P = .05). When compared with former kickers, punters, and quarterbacks, men who played any other position had a higher risk of poor cognition-related QOL, depression, and anxiety. Concussion symptoms were strongly associated with poor cognition-related QOL (highest concussion quartile, RR = 22.3, P < .001), depression (highest quartile, RR = 6.0, P < .0001), and anxiety (highest quartile, RR = 6.4, P < .0001), even 20 years after last professional play.

CONCLUSION

The data suggest that seasons of play and playing position in the NFL are associated with lasting neuropsychiatric health deficits. Additionally, poor cognition-related QOL, depression, and anxiety appear to be associated with concussion in the long term.

Comprehensive Neuropsychiatric and Cognitive Characterization of Former Professional Football Players: Implications for Neurorehabilitation

Objectives: To identify novel targets for neurorehabilitation of people with a remote history of multiple concussions by: (1) comprehensively characterizing neuropsychiatric and cognitive functioning in former professional football players, with a focus on executive functions; (2) distinguishing concussion-related findings from pre-morbid/cohort characteristics of professional football players; and, (3) exploring the relationship between executive functions and neuropsychiatric symptoms. Participants: Sixty-one high-functioning former professional football players and 31 age- and sex-matched control participants without history of concussion or participation in contact sports. Design: Between-groups analyses. Main measures: Neuropsychiatric. Personality Assessment Inventory (PAI) clinical scales plus the Aggression treatment consideration scale; the Mini International Neuropsychiatric Interview (MINI). Cognitive. Comprehensive clinical neuropsychological battery assessing domains of verbal and visuospatial attention; speed of processing and memory; current and estimated pre-morbid IQ; and, executive functioning, including two experimental measures that were novel for this population (i.e., response inhibition and inconsistency of responding on a go/no-go task). Results: (1) Compared to control participants, former professional football players scored significantly higher on the PAI Depression, Mania, and Aggression scales, and significantly lower on response inhibition. (2) Relative to controls, former players with >3 concussions (x ¯ = 6 . 1 ), but not former players with ≤ 3 concussions (x ¯ = 2 . 0 ), showed (i) significantly higher scores on the PAI Depression scale, (ii) significantly more MINI clinical diagnoses overall, and manic/hypomanic episodes specifically, and (iii) significantly poorer executive function. (3) Mediation analysis revealed that concussion exposure had a significant indirect effect on PAI Depression, Mania, and Aggression via inconsistency of responding on the go/no-go task. Conclusions: Notable impairments to neuropsychiatric functioning and worse performance on a sensitive experimental measure of executive function were observed; these were related to both concussion history and pre-morbid (cohort) factors. Therefore, neuropsychiatric and executive functioning should be carefully assessed in those with a remote history of multiple concussions. Moreover, former players' neuropsychiatric symptoms were associated with inconsistency of responding; this suggests that treatments targeted at response inconsistency could help to mitigate neuropsychiatric dysfunction.

Defining Exposures in Professional Football: Professional American-Style Football Players as an Occupational Cohort

Studies of professional American football players have shown that football-related activities lead to acute injuries and may have long-term adverse health outcomes including osteoarthritis, neurocognitive impairment, and cardiovascular disease. However, the full complement of what constitutes professional football exposure has yet to be effectively articulated. Most likely, professional football exposure encompasses a multifaceted array of experiences including head impacts and joint stresses, long-term pain medication use, dietary restrictions, and strenuous training regimens. To study the health of professional American football players, characterizing the group as an occupational cohort and taking advantage of methods established within the discipline of occupational epidemiology may be beneficial. We conducted a narrative review of existing football research, occupational epidemiological methods papers, and occupational medicine studies. Here we describe the traditional occupational epidemiological approach to assessing exposure in a novel cohort and show how this framework could be implemented in studies of professional football players. In addition, we identify the specific challenges associated with studying an elite athletic occupational group, including the healthy worker effect and other types of selection and information biases, and explore these in the context of existing studies of football-related health. The application of well-established occupational epidemiological methods to professional football players may yield new insights into the effects of playing exposure and may provide opportunities for interventions to reduce harm.

Sport-Related Concussion and Mental Health Outcomes in Elite Athletes: A Systematic Review

Background

Elite athletes can experience a diverse range of symptoms following post-concussive injury. The impact of sport-related concussion on specific mental health outcomes is unclear in this population.

Objective

The aim was to appraise the evidence base regarding the association between sport-related concussion and mental health outcomes in athletes competing at elite and professional levels.

Methods

A systematic search of PubMed, EMBASE, SPORTDiscus, PsycINFO, Cochrane, and Cinahl databases was conducted.

Results

A total of 27 studies met inclusion criteria for review. Most of the included studies (67%, n = 18) were published in 2014 or later. Study methodology and reporting varied markedly. The extant research has been conducted predominantly in North America (USA, n = 23 studies; Canada, n = 3), often in male only (44.4%, n = 12) and college (70.4%, n = 19) samples. Depression is the most commonly studied mental health outcome (70.4%, n = 19 studies). Cross-sectional retrospective studies and studies including a control comparison tend to support an association between concussion exposure and depression symptoms, although several studies report that these symptoms resolved in the medium term (i.e. 1 month) post-concussion. Evidence for anxiety is mixed. There are insufficient studies to draw conclusions for other mental health domains.

Conclusion

Consistent with current recommendations to assess mood disturbance in post-concussive examinations, current evidence suggests a link between sports-related concussion and depression symptoms in elite athletes. Causation cannot be determined at this stage of enquiry because of the lack of well-designed, prospective studies. More research is required that considers a range of mental health outcomes in diverse samples of elite athletes/sports.

Electronic supplementary material

The online version of this article (10.1007/s40279-017-0810-3) contains supplementary material, which is available to authorized users.

PET and Single-Photon Emission Computed Tomography in Brain Concussion

This article offers an overview of the application of PET and single photon emission computed tomography brain imaging to concussion, a type of mild traumatic brain injury and traumatic brain injury, in general. The article reviews the application of these neuronuclear imaging modalities in cross-sectional and longitudinal studies. Additionally, this article frames the current literature with an overview of the basic physics and radiation exposure risks of each modality.

Preclinical modelling of militarily relevant traumatic brain injuries: Challenges and recommendations for future directions

As a follow-up to the 2008 state-of-the-art (SOTA) conference on traumatic brain injuries (TBIs), the 2015 event organized by the United States Department of Veterans Affairs (VA) Office of Research and Development (ORD) analysed the knowledge gained over the last 7 years as it relates to basic scientific methods, experimental findings, diagnosis, therapy, and rehabilitation of TBIs and blast-induced neurotraumas (BINTs). The current article summarizes the discussions and recommendations of the scientific panel attending the Preclinical Modeling and Therapeutic Development Workshop of the conference, with special emphasis on factors slowing research progress and recommendations for ways of addressing the most significant pitfalls.

COACH CV: The Seven Clinical Phenotypes of Concussion

Our understanding of the diverse physiological manifestations of concussion is changing rapidly. This has an influence on the clinical assessment of patients who have sustained a concussion. The 2017 Consensus Statement on Concussion in Sport states that numerous post-injury clinical findings, such as cognitive deficits, post-traumatic headaches, dizziness, difficulties with oculomotor function, and depression have all been associated with a poorer prognosis in concussed patients. This demonstrates that there are several potential clinical manifestations after head injury warranting clinical evaluation. We have developed an acronym to guide the office-based assessment of concussed patients to consider each of the potential clinical phenotypes. "COACH CV" prompts the clinician to evaluate for cognitive problems, oculomotor dysfunction, affective disturbances, cervical spine disorders, headaches, and cardiovascular and vestibular anomalies.