Table 1.

Characteristics of enrolled patients aged 25–45 years and related diagnoses

Clinical characteristics	Patients (n)	%
Age (mean)	43.32
Sex
Male	381	35.1%
Female	703	64.9%
Geographic distribution*
North East	313	28.9%
North West	290	26.8%
Centre	161	14.9%
South – Islands	290	26.8%
Charlson Index
0–1	983	90.7%
2–3	91	8.4%
≥4	10	0.9%
SpA-related diagnoses	Diagnosis (n)	%
Peripheral enthesopathy and allied syndromes	248	12.4%
Psoriasis and related conditions	56	2.8%
Regional enteritis, Crohn’s disease, granulomatous enteritis	11	0.6%
Ulcerative colitis	9	0.5%

Note:

^*The geographic origin of 30 patients is missing.

Abbreviation: SpA, spondyloarthritis.