Any past TLOC event (N=3153) Unexplained syncope (n=466) Remaining causes of TLOC (n=2687) OR (95%CI) p-value
Bradicardia ≤ 40 beats per minute 0.2% (6) 0.4% (2) 0.2% (4) 2.891 (0.53-15.83) 0.221
1st degree AV block 1.0% (33) 0.9% (4) 1.1% (29) 0.794 (0.28-2.27) 0.666
Incomplete RBBB 15.2% (478) 12.9% (60) 15.6% (418) 0.802 (0.60-1.07) 0.137
Complete RBBB 0.2% (8) 0.2% (1) 0.3% (7) 0.823 (0.10-6.71) 0.856
Left axis deviation 0.5% (16) 1.1% (5) 0.4% (11) 2.638 (0.91-7.63) 0.073
Right axis deviation 3.7% (116) 3.0% (14) 3.8% (102) 0.785 (0.44-1.38) 0.403
QTcorrected (Fridericia formula) 393.4±17.1 391.5±17.8 393.8±16.9 0.992 (0.99-1.00) 0.007
QTcorrected (Bazett formula) 403.9±22.2 401.7±22.5 404.2±22.1 0.995 (0.99-1.00) 0.021
Short QTc * (Fridericia formula) 2.0% (64) 3.9% (18) 1.7% (46) 2.307 (1.32-4.01) 0.003
Short QTc * (Bazett formula) 2.2% (69) 3.2% (15) 2.0% (54) 1.622 (0.91-2.90) 0.103
Prolonged QTc + (Fridericia formula) 0.1% (4) 0.2% (1) 0.1% (3) 1.924 (0.200-18.54) 0.571
Prolonged QTc + (Bazett formula) 0.9% (29) 0.4% (2) 1.0% (27) 0.425 (0.10-1.79) 0.244
Short PR interval 5.4% (171) 4.7% (22) 5.6% (149) 0.844 (0.53-1.34) 0.469
Premature ventricular complexes (n≥2) 0.3% (10) 0.6% (3) 0.3% (7) 2.481 (0.64-9.63) 0.189
Left ventricle hypertrophy § 8.6% (272) 11.8% (55) 8.1% (217) 1.523 (1.11-2.09) 0.009