Table 1.
Characteristics for each data-set
|
Cohort |
Leiden-EAC |
Groningen |
Sheffield |
Lund |
|---|---|---|---|---|
| (n = 600) | (n = 275) | (n = 391) | (n = 147) | |
|
Year of diagnosis |
1993-2006 |
1945-2001 |
1938-2003 |
1985-1990 |
|
Follow-up years* |
7 years |
14 years |
Not applicable* |
5 years |
|
Total no. of X-ray sets |
2,846 |
862 |
391 |
781 |
|
Method of scoring |
SHS |
SHS |
Larsen |
Larsen |
|
Female n (%) |
412 (69) |
194 (71) |
290 (73) |
98 (67) |
|
Age at diagnosis, mean ± SD |
56 ± 16 |
49 ± 13 |
46 ± 13 |
51 ± 12 |
|
ACPA + n (%) |
323 (55) |
160 (80) |
302 (79) |
114 (80) |
| Rheumatoid factor n (%) | 343 (59) | 258 (94) | N/A* | 115 (81) |
SHS Sharp-van der Heijde score.
*Data of Leiden-EAC, Groningen and Lund were from baseline onwards during respectively 7, 14 and 5 years of follow-up. The data of Sheffield were collected once during the disease period, the mean disease duration was 15 years (range 3–65 years).
N/A not available.