Table 4.
Diagnostic accuracy of five clinical and echocardiographic variables to predict development of atrial fibrillation in 89 dogs with dilated cardiomyopathy.
| Variable | AUC ± SE | 95% CI | Cutoff | Sensitivity | Specificity | +LR | −LR |
|---|---|---|---|---|---|---|---|
| BW (kg) | 0.740 ± 0.052 | 0.636–0.827 | >36 | 0.79 | 0.58 | 1.89 | 0.35 |
| LA (cm) | 0.816 ± 0.044 | 0.719–0.890 | >4.66 | 0.90 | 0.66 | 2.64 | 0.16 |
| Ao (cm) | 0.686 ± 0.056 | 0.579–0.780 | >2.3 | 0.85 | 0.50 | 1.69 | 0.31 |
| LA:Ao | 0.637 ± 0.059 | 0.528–0.736 | >1.73 | 0.95 | 0.38 | 1.53 | 0.13 |
| E mitral (m/s) | 0.647 ± 0.059 | 0.536–0.748 | >0.79 | 0.89 | 0.42 | 1.53 | 0.26 |
BW, body weight; LA, left atrial diameter; Ao, aortic diameter; LA:Ao, left atrial diameter to aortic diameter ratio; E mitral, mitral valve maximal E wave velocity; AUC, area under the curve; SE, standard error; CI, confidence interval; +LR, positive likelihood ratio; −LR, negative likelihood ratio.