The window between competitive sport retirement and middle age has long been a blind spot in concussion research. Most studies track athletes during their playing years or decades later, leaving a critical transitional period — when young adults re-enter civilian life — largely unmapped. This CARE Consortium study fills that gap by examining health outcomes within five years of collegiate graduation, a timeframe when cumulative head trauma effects may first become clinically detectable.
The study enrolled former collegiate athletes who completed baseline evaluations between 2018 and 2021, applying twelve multivariable linear regression models with bootstrapping across a comprehensive battery of outcomes. These included the PHQ-9 for depression, Pittsburgh Sleep Quality Index, Brief Symptom Inventory-18, Neuro-QoL cognitive domain assessments, alcohol use screening, life satisfaction, and physical health via the SF-12. Three primary predictors were examined: lifetime concussion history stratified into zero, one-to-two, and three-or-more events; sport contact classification from unexposed through high-contact; and total years of sport participation. The three-or-more concussion group emerged as the most clinically meaningful signal across multiple health domains, with measurable differences in mental and physical health metrics compared to concussion-naïve athletes.
This work sits within a maturing research landscape that has shifted from binary concussion tracking toward cumulative exposure modeling. The CARE Consortium's multi-institutional structure provides sample diversity rarely achievable in single-site studies, strengthening generalizability. Nonetheless, key limitations apply: the observational design precludes causal inference, self-reported concussion history introduces recall bias, and the five-year post-graduation ceiling excludes longer latency effects that may manifest in midlife. The contact-classification variable also collapses substantial within-sport heterogeneity. Still, the finding that measurable health differences appear this early — before midlife neurodegeneration risk typically accelerates — is incrementally important and supports earlier post-sport health monitoring protocols for high-contact athletes.