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Table 1 Participant description

From: Assessment of heterogeneity between European Populations: a Baltic and Danish replication case-control study of SNPs from a recent European ulcerative colitis genome wide association study

  Baltic Danish Norwegian
  cases controls cases controls cases Controls
  N = 441 N = 1156 N = 560 N = 796 N = 274 N = 282
Sex distribution       
   % female 50 51 48 52 48 41
Age at sampling       
   Median age (years, SD) 44 [17] 40 [12] 49 [16] 43 [11] 39 [15] 32 [7]
Age of diagnosis       
   Median age (years, SD) 38 [16]   35 [11]   38 [15]  
Disease extent, %       
   Left sided colitis 76   80   69  
   Extensive colitis 24   20   31  
Smoking habits, %       
   Current 12   17   13  
   previous 28   36   31  
   never 60   47   56  
  1. In all three panels age- and sex-matched controls have been used.