Table 3.
HRs for classical SCD risk factors by phenotype definition in the total Rotterdam Study population with QT interval measurements and without bundle branch block, atrial fibrillation or QRS duration over 120 ms (n = 5661)
| Cases, n | All SCD, HR (95% CI) | Cases, n | Witnessed SCD, HR (95% CI) | |
|---|---|---|---|---|
| QT quintile 1 | 36 | 1.00 (ref) | 16 | 1.00 (ref) |
| QT quintile 2 | 38 | 1.38 (0.85–2.25) | 21 | 2.01 (1.00–4.03) |
| QT quintile 3 | 34 | 1.48 (0.86–2.56) | 21 | 2.64 (1.24–5.64) |
| QT quintile 4 | 46 | 2.20 (1.18–4.09) | 27 | 4.42 (1.87–10.44) |
| Male | 75 | 1.00 (ref) | 50 | 1.00 (ref) |
| Female | 79 | 0.43 (0.31–0.60) | 35 | 0.29 (0.19–0.46) |
Presented are HRs per QT interval quintile adjusted for age, sex and RR interval (inverse heart rate) and HR for sex adjusted for age.