Data sources/ measurement Patient mortality data was extracted from patient records, as was data on all covariates. If covariate data was missing in records an attempt was made to retrieve this data from the patient or patient relatives. The injury data was extracted from patient records, including imaging reports and intraoperative findings. Protocols from post-mortem examinations were not available. Injuries will be coded using ICD-10. The SRR for an ICD-code will be calculated by dividing the number of fatal outcomes for each ICD-code by the total number of patients with that ICD-code. This results in a number from 0 to 1 that is interpreted as the patient survival ratio.