Table 3.
The cut-off value for diclassification the continuous variables in training set.
| Test result variable (s) | Cut-off value | AUC (95% CI) | p-value | Sensitivity | Specificity |
|---|---|---|---|---|---|
| DLOC | ≥9 min | 0.824 (0.749, 0.900) | <0.01 | 0.740 | 0.863 |
| Daily frequency of attacks | ≥1.5 timesa | 0.705 (0.611, 0.800) | <0.01 | 0.440 | 0.962 |
| BMI | ≥20.5 kg/m2 | 0.689 (0.601, 0.778) | <0.01 | 0.580 | 0.792 |
| 24-h average HR | ≥93 bpm | 0.634 (0.549, 0.719) | <0.01 | 0.300 | 0.913 |
AUC, Area under curve; CI, Confidence Interval; DLOC, duration of loss of consciousness; min, minute; BMI, body mass index; DBP, diastolic blood pressure; HR, heart rate; bpm, beat per minute.
a
The cutoff value of daily frequency of attacks was defined as ≥twice because the actual number of syncope is an integer in clinical practice.