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Table 1 Characteristics of Danish (DK), Norwegian (NO), and Swedish (SE) samples analyzed for association between serotonin transporter gene ( SLC6A4 ) polymorphisms and schizophrenia and suicide attempt among affected (cases) and control individuals

From: Association between a genetic variant in the serotonin transporter gene (SLC6A4) and suicidal behavior in patients with schizophrenia

Country Characteristics Cases Controls
DK N 420 1004
  Gender (% women) 42.6 41.5
  Age 43.9 ± 12.3 43.2 ± 11.8
  Age of onset 27.2 ± 8.9  
  No of suicide attempters 153  
NO N 162 177
  Gender (% women) 46.3 55.5
  Age 37.2 ± 10.7 38.7 ± 10.3
  Age of onset 27.6 ± 8.7  
  No of suicide attempters 42  
SE N 255 292
  Gender (% women) 37.2 37.7
  Age 54.1 ± 15.2 50.3 ± 10.1
  Age of onset 24.6 ± 6.9  
  No of suicide attempters 95