Table 2.

Comparison of risk factors for TBI and the development of post-concussive syndrome (PCS) based on retrospective and prospective studies [1,2,3,4,5,6,7].

Retrospective	Prospective	Overlap	Discrepancy
Male gender Lower socioeconomic status (SES) Behavioral problems Attention deficit hyperactivity disorder (ADHD) Cognitive problems Contact Sports Participation Competitive Sports Participation	Male gender Behavioral problems Adverse family events during childhood Punitive parenting practices Maternal depression Maternal age Maternal education	Male Gender Behavioral Problems	SES status Maternal features Cognitive baseline Sports Participation