Multicentre study found no increased risk of clinically important brain injuries when children presented more than 24 h after a minor head trauma.

Aim: Validated clinical decision rules on neuroimaging are not available for children who are evaluated more than 24 h after a minor head trauma. We compared clinically important traumatic brain injuries in children who presented with a minor head trauma within or after 24 h.

Methods: This was a retrospective analysis of patients aged 0-17 years, who were evaluated for minor head traumas by five paediatric emergency departments in Northern Italy between January 2019 and June 2020.