Table 1 Injury/non-injury-related variables

Injury-related variables

 Glasgow Coma Scale score (first recorded in the ambulance or ED)

 Post-traumatic amnesia duration in minutes

 Loss of consciousness reported in ED

 Change in mental functioning: post-acute confusion or disorientation

 Other transient neurological abnormalities

 CT/MRI/EEG abnormalities

 Cause of MTBI

Non-injury-related variables

 Location (hospital where MTBI was diagnosed)

 Admission to hospital

 Age of patient at injury

 Gender

 Education level of patient

 Pre-injury behavioural and emotional problems of the patient (measured using the CBCL)

 Parental socioeconomic status

 Pre-injury family function (measured using the FAD-GF)

 Family situation (number of family members residing with the patient)