Cluster headache

Table 3 Epidemiological studies of cluster headache

Country	Diagnosis confirmed	Age	Sex	Population sample	Affected	Prevalence per 100 000
Sweden [10]	Yes	18	Men	9803	9	92
San Marino [3]	Yes	All	Both	21792	14	69
USA [6]	No	All	Both	6476	26	401
San Marino [7]	Yes	All	Both	26628	15	56
Norway [5]	Yes	18–65	Both	1838	7	381
Sweden [11]	Yes	All	Both	31750	48	151
Italy [8]	Yes	18–65	Both	6500	13	200
Italy [9]	Yes	Over 14	Both	10071	21	279
Germany [4]	Yes	18–65	Both	3336	4	119
Germany [12]	Yes	25–75	Both	2291	2	150

ISSN: 1750-1172