Table 2

Estimated cumulative cardiac incidence rate in probands and differences between de novo and familial cases at each age point

Age point5 years old10 years old15 years old
Syncope, % (95% CI)
De novo group20.765.570.7
Familial group8.345.870.8
Difference12.4 (0.6 to 23.4)19.7 (22.9 to 36.2)−0.1 (−14.6 to 17.3)
CA, % (95% CI)
De novo group17.236.250
Familial group0.08.337.5
Difference17.2 (8.9 to 23.5)27.9 (14.9 to 39.8)12.5 (−4.3 to 30.9)
Syncope or CA, % (95% CI)
De novo group34.587.9100.0
Familial group8.354.183.3
Difference26.2 (12.9 to 37.0)33.8 (17.6 to 48.5)16.7 (8.2 to 30.2)
  • CA, cardiac arrest; CI, confidence interval.