Table 1 Diagnostic characteristics of 11 Ftc formulae
Thresh. | Sens. | Spec. | Conc. | R2 | |
|---|---|---|---|---|---|
Mechanical Equations | |||||
FtcWodey = systolic time + 0.00129 (HR − 60) 20 | 2% | 96% | 93% | 100% | 0.75 |
FtcWeissler = systolic time + 0.0016 (HR − 60) 11 | 3% | 91% | 93% | 98% | 0.71 |
FtcGobbato = systolic time + 0.00192 (HR − 60) 18 | 3% | 91% | 93% | 95% | 0.66 |
FtcPenati = systolic time + 0.00122 (HR − 60) 19 | 2% | 93% | 93% | 99% | 0.75 |
FtcLian = cycle time [0.709 x systolic time x (cycle time + 0.41)] 26 | 4% | 78% | 87% | 89% | 0.61 |
Electrical Equations | |||||
\( {Ftc}_{Bazett}=\frac{systolic\kern0.17em time}{\sqrt{cycle}\; time} \)24 | 3% | 91% | 93% | 98% | 0.71 |
\( {Ftc}_{Fredericia}=\frac{systolic\kern0.17em time}{\sqrt[3]{cycle}\; time} \)25 | 2% | 87% | 85% | 90% | 0.55 |
FtcHodges = systolic time + 0.00175 (HR − 60) 16 | 3% | 91% | 93% | 97% | 0.68 |
FtcFramingham = systolic time + 0.154 (1.0 − cycle time) 21 | 2% | 93% | 93% | 98% | 0.73 |
FtcAdams = systolic time + 0.1464 (1.0 − cycle time) 22 | 2% | 93% | 93% | 98% | 0.74 |
FtcChambers = systolic time + 0.127 (1.0 − cycle time) 23 | 2% | 96% | 93% | 99% | 0.76 |