This is a multi-centre, prospective long-term follow up cohort study of the 1163 trauma patients admitted to the Prince of Wales Hospital (PWH), Queen Elizabeth Hospital (QEH) and Tuen Mun Hospital (TMH) in Hong Kong in 2017-2018. Patients will be recruited within four weeks of ED attendance as soon as the patient is clinically stable and conscious. The follow-up period for return to work status of the 1163 trauma patients will extend from baseline to one year after trauma.