Clinical study participation has historically been heavily biased toward specific demographics.

Several people will be invited to enroll in this study so that it may collect a variety of data about traumatic brain injury clinical trial experiences and identify barriers to participation as well as the causes of participants' failure or withdrawal.

People with traumatic brain injury who are invited to take part in medical research will benefit from the analysis of the data.

Inclusion Criteria:

• Patient has been diagnosed with traumatic brain injury
• Patient has self-identified as planning to enroll in an observational clinical trial
• Patient is a minimum of 18 years or older

Exclusion Criteria:

• Pregnant or nursing patients
• Inability to perform regular electronic reporting
• Patient does not understand, sign, and return consent form

Quantity of participants in traumatic brain injury study who sustain participation until study completion