Table 1.

Data collected at baseline and follow-up

Baseline (face-to-face)
Sociodemographic	Age, sex, place of birth, primary language, education, marital status
Employment	Employment status, occupation, household income
Health	BMI (height and weight), history of chronic illness
Lifestyle habits	Smoking status and alcohol consumption
Circumstances of crash	Road user type, role of the injured and use of any preventive measure such as helmet or seatbelt, road type, time of the day
Quality of life, disability and functioning	Likert scale for overall health, PedsQL, EQ-5D-3L, 4 weeks prior to crash and at baseline. History of any disability, WHODAS II (12-item version). GOSE and KOSCHI
Injury	Type of injury and associated hospitalisation, AIS score
Work	Return to work, modified duties, hours
Cost	Direct and indirect costs such as medical costs, drugs, diagnostics, transportation, legal costs, property damage and compensation. Separate assessment of health system costs will be undertaken
1, 2, 4 and 12 months follow-up (telephone interviews)
Health-related quality of life	Likert scale for overall health, EQ-5D-3L and SF-12.
Healthcare utilisation	Days of hospitalisation, rehabilitation and home care
Quality of life, disability and functioning	Likert scale for overall health, PedsQL, EQ-5D-3L, 4 weeks prior to crash and at baseline. History of any disability, WHODAS II (12-item version). GOSE and KOSCHI.
Disability and functioning	History of any disability, WHODAS II
Cost	Direct and indirect costs such as medical costs, drugs, diagnostics, transportation, legal costs, property damage and compensation
Social impact at 12 months follow-up (10% of the sample)
In-depth interview	Exploring issues related to access to healthcare, impact on carer, insurance, advice seeking (health and compensation), social life, impact on work, perception of recovery, impact of injury general view

AIS, Abbreviated Injury Scale; BMI, body mass index; EQ-5D-3L, EuroQol five-dimension three-level version; GOSE, Glasgow Outcome Scale—Extended; KOSCHI, King's Outcome Scale for Childhood Head Injury; PedsQL, Pediatric Quality of Life Inventory; SF-12, Short Form-12; WHODAS II, WHO Disability Assessment Schedule 2.0.