|
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.
