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Table 1 Baseline characteristics

From: Increased risk for chronic comorbid disorders in patients with inflammatory arthritis: a population based study

 

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%

  1. IA = inflammatory arthritis sd= standard deviation, iqr=interquartile range, min= minimum, max=maximum.
  2. *without IA.