Compliance with NICE guidelines for the intended use of CT scanning
| Indication for CT from NICE guideline | Proportion of hospitals compliant (%) |
| Suspicion of fracture or tense fontanelle | 97 |
| Any sign of basal skull fracture | 97 |
| Focal neurological deficit | 97 |
| H/O post-traumatic seizure | 96 |
| Local protocol present specifying when to CT | 90 |
| Presence of abnormal drowsiness | 88 |
| H/O LOC | 87 |
| Dangerous mechanism of injury | 80 |
| Coagulopathy and LOC/amnesia | 79 |
| 3+ episodes of vomiting | 75 |
| Clinical suspicion of NAI as cause of head injury | 74 |
| GCS <14 | 74 |
| <1 year of age and GCS <15 | 72 |
| H/O amnesia >5 min | 64 |
| <1 year and bruise/lac >5 cm | 63 |
GCS, Glasgow Coma Scale; H/O, History of; LOC, loss of consciousness; NAI, non-accidental injury.