One of the biggest problems is determining when post- injury scores have actually returned to the baseline. Determining the point beyond which scores are the same and not just appear to be the same through a chance variation is difficult. Determining the margin of error and the reliable significant difference is not trivial. Reliable Change scores also fall within a relatively wide band of what might be clinically significant rather than statistically significant. We don't want someone still at risk taking the chance on further injury or career- ending injury.
People can be asymptomatic and still be cognitively deficient.
They can still have problems with memory and processing of information. Echemendia suggests that the athletes be looked at individually, evaluating the entire pattern including initial physical symptoms, how long symptoms lasted, the nature of the injury and the test data. Clinicians can not base their decisions on RC scores alone.