Table 3.

Association between latitude and prevalence of Behçet’s disease (adapted from Demirkesen et al²⁵)

Latitude (°N)	Country/ethnic group	Prevalence of Behçet’s disease per 105
25	Saudi Arabia	20
31	Palestinian	>10
32	Iran	16.7
32	Morocco	>15
36	Japan	13.5
39	Portugal	1.53
39	Turkey	100
42	Italy	2.5
52	England	0.5
56	Scotland	0.27
60	Sweden	1.18
62	Amerindian	Not reported