Headache causing waking from sleep | 98 (10 to 960) | 9 |
|
Dizziness or lack of coordination | 49 (3 to 710) | 4 |
|
Rapidly increasing headache frequency | 12 (3 to 48) | 1 |
|
Abnormal neurological examination | 5.3 (2.4 to 12) | 0.5 |
|
Headache with focal neurological symptoms | 3.1 (0.37 to 25) | 0.3 |
|
Aggravated by exertion or Valsalva-like manoeuvre | 2.3 (1.4 to 3.8) | 0.2 |
|
Associated vomiting | 1.8 (1.2 to 2.6) | 0.2 |
|
Worsening headache | 1.6 (0.23 to 10) | 0.1 |