Factors associated with unknown AF
| Variables | OR | 95% Confidence Intervals (CI) | p value | |
| Lower limit | Upper limit | |||
| Univariate logistic regression analysis | ||||
| Age (per year increase) | 1.08 | 1.06 | 1.11 | <0.001 |
| Hypertension | 6.65 | 3.17 | 13.90 | <0.001 |
| Diabetes | 1.94 | 0.93 | 4.07 | 0.077 |
| Coronary artery disease | 2.79 | 1.44 | 5.40 | 0.002 |
| Hypercholesterolaemia | 1.16 | 0.61 | 2.22 | 0.644 |
| Valvular disease | 5.27 | 2.68 | 10.35 | <0.001 |
| Previous CVA/TIA | 4.76 | 2.48 | 9.12 | <0.001 |
| Palpitations | 3.44 | 1.65 | 7.18 | 0.001 |
| Recording duration (per hour increase) | 1.05 | 1.03 | 1.07 | <0.001 |
| ≥10 sinus pauses/day | 12.2 | 6.13 | 24.27 | <0.001 |
| ≥50 AE/day | 15.70 | 6.45 | 38.21 | <0.001 |
| Presence of SVE runs | 14.40 | 7.17 | 28.90 | <0.001 |
| Variables (bootstrapped) | ||||
| Multivariate logistic regression analysis | ||||
| Hypertension | 2.54 | 1.08 | 8.61 | 0.034 |
| Previous CVA | 4.14 | 1.81 | 13.01 | 0.001 |
| Valvular disease | 5.07 | 2.48 | 18.70 | <0.001 |
| Palpitations | 2.86 | 1.33 | 10.44 | 0.015 |
AE, atrial ectopic; AF, atrial fibrillation; CVA, cerebrovascular accident; SAE, significant atrial ectopy; SVE, supraventricular ectopic; TIA, transient ischaemic attack.