Long-term brain health profiles following exposure to repetitive head impacts and/or concussions in contact sports are a public health focus and the subject of a national debate. The true prevalence rates of mild cognitive impairment (MCI) or neurobehavioural dysregulation are unknown in the nearly 20 000 current/living former professional football players. Here, we describe the procedures and methodology of the prevalence study of cognitive function in former professional football players from the Brain Health Initiative at the University of Pittsburgh. The objective is to define the prevalence of normal cognitive function versus neurodegeneration in former professional football players through clinical, neuroimaging and biomarker assessments.

Participants include former professional football players aged 29–59 years at study onset who played a minimum of three professional football games in three professional seasons and non-exposed controls. Participants are recruited by two mechanisms, a random and non-random sample. The full study protocol includes a 3–4-day, multidomain assessment (eg, neurological, neurocognitive, psychiatric, sleep, vestibular, orthopaedic and cardiovascular) for neurodegenerative disease and overall health and function, including MRI, positron emission tomography scans, analysis of blood plasma and cerebrospinal fluid, neurocognitive assessments, applanation tonometry, overnight sleep study and informant interview. A multidisciplinary clinical panel conducts a blinded diagnostic consensus conference to adjudicate the presence of MCI and/or traumatic encephalopathy syndrome, which serve as the study’s primary and secondary outcomes, respectively. Point prevalence of these for both the exposed and unexposed cohorts will be calculated as the primary statistical analysis.

The University of Pittsburgh Institutional Review Board approved the study prior to recruiting human subjects (protocol numbers STUDY19010008: sIRB - Brain Health Initiative (Part 1) and STUDY19030211: sIRB - Brain Health Initiative (Part 2)). The results will be disseminated in peer-reviewed journals and as presentations at national and international scientific conferences.

Older adults are particularly vulnerable to climate-related stressors such as extreme heat, food and water insecurity and displacement, all of which can worsen existing health conditions. This is further compounded by age-related physiological changes, pre-existing health conditions and social factors like isolation and limited mobility. With a growing population of older adults in low-income and middle-income countries, their vulnerability to climate change becomes a critical global public health issue and yet is understudied and needs urgent and comprehensive action. This study aims to investigate how climate seasonality impacts the health, well-being and socioeconomic conditions of older adults in rural communities of Kenya.

This formative qualitative study will use a combination of 40 in-depth interviews with older adults and key informant interviews with 20 health workers and 12 policy-makers to provide a comprehensive understanding of the impacts of climate seasonality on the health, well-being and socioeconomic conditions of older adults in rural communities of Busia and Kilifi Counties in Kenya. These counties were selected for the study due to their history of significant flooding and heat stress events. Study participants will be purposively selected for the interviews. A thematic approach will be employed in data analysis using NVivo V.14 software.

This study received ethical approval from the Medical College of Wisconsin Institutional Review Board, Institutional Scientific Ethics Review Committee at Africa International University and National Commission for Science, Technology and Innovation, Kenya. The study outputs will reflect the views and experiences of older adults, health workers and policy-makers. The findings will be disseminated to the scientific community through conferences and peer-reviewed publications and to the older adults, health workers, communities and policy-makers through videos and dissemination meetings, and policy briefs. The findings will deepen understanding of how climate seasonality is experienced by older people and shape strategies for resilience and adaptation.