Predictive Factors and Clinical Prediction Score for Serious Intracranial Causes in Acute Nontraumatic Headache at an Emergency Department

Table 5

Clinical prediction scores for serious intracranial cause in acute nontraumatic headache.

Predictive factors	Points
Abrupt onset	1
Awakening pain	1
Duration >1 week	1
Fever	1
Worst headache ever	2
Alteration of consciousness	3
Localizing neurological deficit	1
Total	10

Note: a score of ≥3 points is predictive of serious intracranial cause.