Table 3

Hazard Ratios for First Cardiac Event Age 18 to 40 Years in 570 Patients Without Cardiac Events Before Age 18 Years

FactorHazard Ratio95% CIp Value
Genotype
 LQT2 vs. LQT12.421.54–3.79<0.01
 LQT3 vs. LQT10.980.47–2.030.96
 LQT2 vs. LQT32.461.23–4.920.01
Gender
 Female (vs. male)2.771.66–4.62<0.01
QTc Category
 440–469 ms (vs. ≤439 ms)7.741.04–57.84<0.05
 470–499 ms (vs. ≤439 ms)8.801.19–65.05<0.05
 500–549 ms (vs. ≤439 ms)14.751.99–109.10<0.01
 ≥550 ms (vs. ≤439 ms)21.292.85–159.38<0.01
Time-dependent beta-blocker therapy
 Beta-blockers (vs. no beta-blockers)0.680.30–1.570.37

Abbreviations as in Table 2.