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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.