Table 3

Number and percentage of reportable MRI abnormalities by type and sex

All (N=471)Male (N=241)Female (N=230)
n% (95% CI)n% (95% CI)n% (95% CI)
Any abnormality214.5 (2.8 to 6.7)62.5 (0.9 to 5.3)156.5 (3.7 to 10.5)
Acute brain infarction
Acute brain haemorrhage
Suspected intracranial mass lesion71.5 (0.6 to 3.0)20.8 (0.1 to 3.0)52.2 (0.7 to 5.0)
Suspected intracranial aneurysm or vascular malformation91.9 (0.9 to 3.6)20.8 (0.1 to 3.0)73.0 (1.2 to 6.2)
Colloid cyst of the third ventricle
Acute hydrocephalus
Significant sinus pathology30.6 (0.1 to 1.9)10.4 (0.0 to 2.3)20.9 (0.1 to 3.1)
Other* 20.4 (0.0 to 1.5)10.4 (0.0 to 2.3)10.4 (0.0 to 2.4)
  • *Possible keratocystic odontogenic tumour of the right mandible (n=1); hyperintense area in the suprasellar cistern with differential diagnosis of small dermoid cyst, craniopharyngioma or thrombosed anterior communicating artery aneurysm (n=1).