All Centers | Hospital de Clínicas de Porto Alegre, Porto Alegre (South Brazil) | Hospital Universitário Evangélico, Curitiba (South Brazil) | Hospital Universitário Getúlio Vargas, Manaus (North Brazil) | P value | |
---|---|---|---|---|---|
Number of patients | 204 | 54 | 84 | 66 | |
Male N (%) | 131 (64.2) | 28 (51.9) | 55 (65.5) | 48 (72.7) | 0.057 |
Age in years (Mean ± SD, range) | 48.6 ± 12.8 (18–87) | 51.3 ± 12.2 (22–77) | 47.8 ± 13.2 (18–87) | 47.5 ± 12.7 (18–72) | 0.213 |
Disease duration in years (Mean ± SD, range) | 17.2 ± 10.6 (2–58) | 17.4 ± 9.2 (4–44) | 15.9 ± 10.9 (2–55) | 18.5 ± 11.2 (2–58) | 0.209 |
Self-reported ethnicity: white N (%) | 126 (61.8) | 41 (75.9) | 67 (79.8) | 18 (27.3) | < 0.001 |
Patients fulfilling ASAS classification criteria for Peripheral SpA N (%) | 59 (28.9) | 17 (31.5) | 29 (34.5) | 13 (19.7) | 0.123 |
Patients fulfilling ASAS classification criteria for Axial SpA N (%) | 145 (71.1) | 37 (68.5) | 55 (65.5) | 53 (80.3) | 0.123 |
Patients with at least one enthesitis N(%) | 124 (60.8) | 44 (81.5) | 43 (51.2) | 37 (56.1) | 0.001 |
Composite activity index (mean ± SD) | |||||
BASDAI* | 3.5 (2.3) | 4.7 (2.6) | 3.1 (2.0) | 3.0 (2.2) | 0.002 |
ASDAS CRP* | 2.3 (1.2) | 2.8 (1.2) | 2.4 (1.0) | 1.8 (1.2) | 0.001 |
ASDAS ESR* | 2.6 (1.0) | 2.8 (1.2) | 2.6 (1.0) | 2.5 (1.0) | 0.610 |
DAS- 28 ** | 3.6 (1.4) | 3.9 (1.4) | 3.7 (1.5) | 3.2 (1.2) | 0.460 |
Enthesitis indices: Median (P25%, P75%), range / Mean ± SD | |||||
MASES | 1 (0, 5), 0–13/ 2.8 ± 3.9 | 3 (0, 7), 0–13/ 4.4 ± 4.3 | 0 (0, 3), 0–13/ 2.2 ± 3.5 | 0 (0, 3), 0–13/ 2.3 ± 3.6 | < 0.001 |
SPARCC | 0 (0, 3), 0–16/ 2.4 ± 3.9 | 2 (0, 6), 0–16/ 3.7 ± 4.6 | 0 (0, 3), 0–13/ 1.8 ± 3.0 | 0 (0, 2), 0–16/ 2.1 ± 4.0 | 0.005 |
LEI | 0 (0, 2), 0–6/ 1.0 ± 1.6 | 0 (0, 2), 0–6/ 1.5 ± 2.0 | 0 (0, 1), 0–6/ 0.8 ± 1.5 | 0 (0, 1), 0–6/ 0.7 ± 1.4 | 0.016 |