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Table 4 Durations and frequency of attacks in PH

From: Paroxysmal hemicrania: a retrospective study of a consecutive series of 22 patients and a critical analysis of the diagnostic criteria

Parameters

PH (n-17)

Durations of attacks

 

< 2 minutes

7 (41%)

2–30 minutes

17 (100%)

> 30 minutes

4 (24%)

Attacks frequency

 

>5/day for more than half of the time

17 (100%)

maximum attack frequency

10–20/day

minimum attack frequency

0–5/day

Nocturnal attacks

6 (35%)