Table 1 Population characteristics at study inclusion

N° (%) of female

77 (90.6)

Age, (mean ± SD), years

44.9 ± 12.2

Formal education, (mean ± SD), years

11.9 ± 4.2

N° (%) of patients RF+

78 (91.8)

N° (%) of patients ACCP+

76 (89.4)

Follow-up at the EAC, (mean ± SD), years

7.5 ± 4.1

N° (%) of patients with disease duration <5 years

31 (36.5)

N° (%) of patients with disease duration within 5 to 10 years

28 (32.9)

N° (%) of patients with disease duration >10 years

26 (30.6)