Table 1 Demographic and clinical characteristics of the rheumatoid arthritis patients from the “Hospital Clínico San Carlos - Rheumatoid Arthritis Cohort” and from the “Hospital Universitario de La Princesa Early Arthritis Register Longitudinal” with more than 2 years of follow-up after disease diagnosis.
Variables | HCSC-RAC | PEARL | ||
|---|---|---|---|---|
n = 1,461 | Missing data, n (%) | n = 280 | Missing data, n (%) | |
Women, n (%) | 1,105 (75.6) | 0 | 223 (79.6) | 0 |
Age of RA diagnosis, median (IQR) | 58.6 (45.2–72.0) | 0 | 54.9 (45.3–67.6) | 0 |
Elapsed time from RA symptoms onset to diagnosis, in years, median (IQR) | 0.7 (0.3 to 3.5) | 180 (12.3) | 0.5 (0.3–0.7) | 0 |
Presence of Rheumatoid Factor, n (%) | 885 (61.5) | 23 (1.6) | 181 (64.6) | 0 |
Presence of ACPA, n (%) | 465 (44.9) | 425 (29.1) | 234 (83.9) | 1 (0.4) |
Nationality, n (%): | 0 | 0 | ||
Spanish | 1,160 (79.4) | — | 232 (82.7) | — |
South/Centre America, Caribbean | 237 (16.2) | — | 37 (13.2) | — |
Other | 64 (4.4) | — | 11 (3.9) | — |
Year of RA diagnosis, n (%): | 0 | 0 | ||
2001–2005 | 614 (42.0) | — | 107 (38.2) | — |
2006–2011 | 847 (58.0) | — | 128 (45.7) | — |
2012–2014 | 0 | 45 (16.1) | — | |
Median HAQ in the first 2 years after RA diagnosis, median (IQR) | 0.50 (0.19–1.10) | 376 (25.7) | 0.63 (0.25–1.00) | 1 (0.4) |
Median ESR in the first 2 years after RA diagnosis, median (IQR) | 23 (14 to 36.5) | 248 (17.0) | 20 (13–30) | 1 (0.4) |
Any biological therapy in the first 2 years after RA diagnosis, n (%) | 89 (6.1) | 0 | 28 (10.0) | 0 |
Hospital admissions in the first 2 years after RA diagnosis, n (%) | 0 | 13 (4.6) | ||
0 | 1,258 (86.1) | — | 230 (86.1) | — |
1 | 144 (9.9) | — | 28 (10.5) | — |
2 | 39 (2.7) | — | 5 (1.87) | — |
3 | 16 (1.1) | — | 2 (0.8) | — |
≥4 | 4 (0.28) | — | 2 (0.8) | — |
Inclusion period, calendar years | 2001–2011 | — | 2001–2014 | — |
