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Table 1 Descriptive statistics for individuals with lone atrial fibrillation (LAF) in the Swedish population (1987–2009)

From: Family history as a risk factor for recurrent hospitalization for lone atrial fibrillation: a nationwide family study in Sweden

  Individuals diagnosed with LAF and with both parents living in Sweden sometime during 1987–2009 (n=16,160) Individuals diagnosed with LAF and with at least one sibling living in Sweden sometime during 1987–2009 (n=20,373)
  Recurrence No Recurrence Recurrence No Recurrence
N 7,375 8,785 9,909 10,464
AF parents 26.9% 21.6%   
LAF parents 2.7% 2.5%   
AF siblings    11.6% 7.7%
Men 79.0% 75.8% 77.2% 74.1%
Age at diagnosis of LAF, mean (SD) 48.3 (10.1) 46.3 (11.1) 50.5 (9.0) 48.6 (10.7)