Table 1

Number and annual incidence (per million inhabitants) of primary systemic vasculitides in Vilnius compared with the selected European studies conducted during the past decade

	Vilnius, Lithuania 1990–1999	Kristiansand, Norway† 1992–1996	Norwich, Norfolk 1988–1994	Lugo, Spain 1988–1997
*7.2/million (95% CI 3.8 to 13.3) for the population aged 50 years and older; †overall, 150 000 adult inhabitants in the Kristiansand study, 414 500 in the Norwich study, 250 000 in the Lugo study, 468 504 in Vilnius refer to the study period; ‡polyarteritis nodosa and hypersensitivity vasculitis in this study are reported for the period from 1988 to 1997³ and from 1990 to 1994,⁴ respectively.
Giant (temporal arteritis) cell arteritis
Number of patients	11	24	–	110
Median age in years (range)	70 (50–87)
Overall annual incidence	2.3/10⁶*	31.9/10⁶		45.6/10⁶

Takayasu arteritis
Number of patients	6	0	0	0
Median age in years (range)	40 (16–49)
Overall annual incidence	1.3/10⁶

Polyarteritis nodosa
Number of patients	36	5	33‡	13
Median age in years (range)	48 (17–72)
Overall annual incidence	7.7/10⁶	6.7/10⁶	8.0/10⁶	6.9/10⁶

Hypersensitivity vasculitis/cutaneous leucocytoclastic angiitis
Number of patients	122	2	37	56
Median age in years (range)	45 (17–85)
Overall annual incidence	26.0/10⁶	2.7/10⁶	17.8/10⁶	29.7/10⁶

Henoch-Schönlein purpura
Number of patients	14	3	3	27
Median age in years (range)	18 (16–21)
Overall annual incidence	3.0/10⁶	6.7/10⁶	1.2/10⁶	14.0/10⁶

Churg-Strauss syndrome
Number of patients	6	2	6	2
Median age in years (range)	43 (27–58)
Overall annual incidence	1.3/10⁶	2.7/10⁶	2.4/10⁶	1.1/10⁶

Wegener’s granulomatosis
Number of patients	10	5	21	9
Median age in years (range)	57 (22–68)
Overall annual incidence	2.1/10⁶	6.7/10⁶	8.5/10⁶	4.8/10⁶