- Imaging modality and diagnoses (n=329).
| Variables | n (%) |
|---|---|
| Neuroimaging performed | |
| CT head | 262 (79.6) |
| MRI brain | 255 (77.5) |
| Both CT and MRI | 188 (57.1) |
| Abnormal neuroimaging | 105 (31.9) |
| Final diagnosis as reported | |
| Primary headache | 54 (16.4) |
| Migraine | 47 (14.3) |
| Tension-type | 5 (1.5) |
| Cluster | 1(.3) |
| Hemicrania continua | 1(.3) |
| Secondary headache | 160 (48.6) |
| Idiopathic intracranial hypertension | 33 (10.0) |
| Ischemic stroke | 21 (6.4) |
| Brain tumor | 19 (5.8) |
| Intracranial hemorrhage | 13 (4.0) |
| CNS infection | 12 (3.6) |
| Cerebral venous thrombosis | 10 (3.0) |
| Other | 52 (15.8) |
| Non-specific headache | 115 (35.0) |
Data are number (%) unless otherwise noted