Table 1 Demographic and epidemiological data in patients with PFAPA syndrome.

No of patients	54
Men, n (%)	33 (61)
Women, n (%)	21 (39)
Origin
Sephardic, n (%)	41 (76)
Ashkenazi, n (%)	13 (24)
Age of entry to day care, years (range)	1.8 (0.25–4)
Age of entry of sibling to day care, years (range)	2.1 (0.25–4)
Medical history
Atopic manifestations, n (%)	21 (39)
Family medical history
Atopic manifestations, n (%)	16 (30)
FMF, n (%)	4 (7)
Autoimmune diseases, n (%)	4 (7)

FMF, familial Mediterranean fever; PFAPA, periodic fever, aphthous stomatitis, pharyngitis and adenitis.