Suicide is associated with traumatic brain injury according to the study described by Teasdale and Engberg in this volume (pp436–440).1 Using the opportunity for record linkage in Denmark, the authors compared suicide rates after concussion, cranial fracture, and probable brain lesion (defined as those with International Classification of Diseases codes for cerebral contusion or traumatic intracranial haemorrhage). All these groups, as expected, had higher suicide rates than the general population. Of most interest though is that those with lesion had higher suicide rates than those with concussion (hazard …