Table 2.
Competing risk regression model and hazard ratios (HR), 10-year follow-up.
| Univariate HR | P-value | Multivariate HRa | P-value | |
|---|---|---|---|---|
| Normal ECG (N = 7963) | 1.0 | 1.0 | 1.0 | 1.0 |
| Any ECG abnormality (N = 1548, 16.3%) | 2.86 (1.77–4.62) | <0.001 | 1.62 (1.00–2.62) | 0.052 |
| QRS duration > 110 ms (N = 110, 1.2%) | 6.44 (2.59–16.00) | <0.001 | 3.09 (1.27–7.52) | 0.013 |
| QTc (N = 534, 5.6%) | 2.68 (1.38–5.22) | 0.004 | 1.26 (0.64–2.48) | 0.500 |
| QRST-angle > 100° (N = 125, 1.3%) | 5.61 (2.26–13.90) | <0.001 | 3.40 (1.37–8.44) | 0.009 |
| LVH (N = 395, 4.2%) | 5.07 (2.78–9.23) | <0.001 | 2.67 (1.42–5.01) | 0.002 |
| ER ≥ 0,1 mV (N = 351, 3.7%) | 1.12 (0.35–3.55) | 0.850 | 0.86 (0.27–2.72) | 0.800 |
| ER ≥ 0,2 mV (N = 40, 0,4%) | 0.00 (0–0) | N/A | 0.00 (0–0) | N/A |
| T-wave inversion (N = 284, 3,0%) | 4.05 (1.94–8.45) | <0.001 | 2.98 (1.30–6.79) | 0.010 |
a
Adjusted for age, gender, systolic blood pressure, diabetes, BMI and cholesterol. ECG = electrocardiogram, ER = early repolarization, HR = hazard ratio, LVH = left ventricular hypertrophy, QTc = heart rate corrected QT interval. HRs for ER > 0.2 mV were not possible to analyze as no events occurred in this group during the 10-year follow-up.