| |
IA patients
|
Matched controls
|
|---|
|
N (ratio 1:2)
|
3,354
|
6,708
|
|
Sex
| | |
|
Female
|
63.7%
|
63.7%
|
|
Age, years
| | |
|
Mean (sd)
|
55 (15)
|
55 (15)
|
|
Follow-up, years
| | |
|
Median (iqr)
|
2.8 (1.7-4.9)
|
2.7 (1.6-4.9)
|
|
Number of chronic diseases at inclusion*
| | |
|
Median (iqr)
|
1 (0–3)
|
1 (0–2)
|
|
Year of inclusion,
| | |
|
2001
|
<1%
|
<1%
|
|
2002
|
16%
|
16%
|
|
2003
|
12%
|
12%
|
|
2004
|
9%
|
9%
|
|
2005
|
10%
|
10%
|
|
2006
|
10%
|
10%
|
|
2007
|
13%
|
13%
|
|
2008
|
11%
|
11%
|
|
2009
|
11%
|
11%
|
|
2010
|
9%
|
9%
|
- IA = inflammatory arthritis sd= standard deviation, iqr=interquartile range, min= minimum, max=maximum.
- *without IA.
