Clinical features and epidemiology of spondyloarthritides associated with inflammatory bowel disease

Table 6 Epidemiologic studies on mixed IBD populations unless otherwise indicated

Author	Yr	Country	Patients	AS1 (%)	SI (%)	Peripheral arthritis (%)	IBD-SpA2 (%)	IBP3 (%)	Enthesopathy (%)	Overall (%)
Scarpa[34]	1992	Italy	79 (UC)	25.3	43	18.9	-	-	-	62
Protzer[35]	1996	Germany	521	45.1	-	28.1	11.5	-	-	-
Veloso[36]	1996	Portugal	792	3.0	-	16.2	-	-	-	-
Orchard[1]	1998	Great Britain	1459	1.0	-	7.4	-	5.2	-	21.4
Suh4[37]	1998	Korea	129	1.6	6.2	15.5	-	-	-	17.1
De Vlam[38]	2000	Netherlands	103 (CD)	3.8	21.84		34.9	30	7	39
Queiro[39]	2000	Spain	62 (UC)	3.2	24.2	30.6	-	-	-	-
Salvarani[2]	2001	Italy, Netherlands	160	2.6	3.6	10.6	18.1	8.8	10	33.1
Christodoulou5[40]	2002	Greece	252	-	5.9	2.8	-	-	-	17.0
Palm6[41]	2002	Norway	406	2.4	2.0	17	22	18.0	26	32.5
Mendoza[42]	2005	Spain	566	1.8	1.9	6.7	-	-	-	-
Turkcapar[3]	2006	Turkey	162	9.9	45.7	14.8	45.7	-	50.0	-
Peeters[43]	2008	Belgium	251 (CD)	6	27	29	-	-	-	-
Rodriguez[44]	2008	Puerto Rico	100	2.6	13	5	42	42	-	-
Lanna[45]	2008	Brazil	130	6.2	9.2	25.4	-	10	5.4	31.5

¹Modified New York criteria;

²IBD-SpA according to ESSG criteria;

³Calin’s criteria;

⁴Classification according to Gravallese[62]; ⁵Only symptomatic SI, X-ray assessment; Undefined arthralgia group; no definitions are given for spondylitis or arthritis; ⁶IBP and SI were considered excluding patients with AS; asymptomatic patients included in SI.