The study is a historical cohort study with a 30-day follow-up. Patients with a primary diagnosis of penetrating trauma were included. In addition, patients with penetrating trauma as a secondary diagnosis were also included, if the primary diagnosis was multi-trauma, cardiac arrest, or the patient was found dead.
Only patients from the former H:S area were included. The physician manning the MECU prospectively registered data in an access database. Mortality after 30 days was later assessed via the Danish Civil Registry System.
The incidences were assessed by Poisson regression and we used logistic regression to analyse the risk of mortality in relation to the number of penetrating traumas. P < 0.05 was considered significant.