Table 8.

Fulfilment of proposed subcriteria for sentinel headache

Diagnostic criteria	Fulfilment of diagnostic criteria (number of patients with stroke)
Proposed diagnostic criteria for sentinel headache
A. Any headache fulfilling criteria B and C	81
B. Acute ischaemic stroke has been diagnosed	81
C. Evidence of causation demonstrated by either of the following:
C1. A new headache that had never been experienced before has developed within one week before other symptoms	27
C2. A previous headache with altered characteristics has developed within one week before other symptoms	54
Total fulfilling proposed criteria	81