Table 4.

Characteristics of the patients according to the clinical setting in which they were identified for the study^a

	Existing patients (n = 343)	Self referred (n = 105)	New referrals (n = 303)
Investigator clinical diagnosis of axial SpA, no. (%)	136 (39.7)	30 (28.6)	153 (50.5)
Male, %	43	63	54
Age, mean years	41.8	41.2	40.7
HLA–B27 positive, %	55	43	44

^aSpA = spondyloarthritis.