Table 3.
Feature reduction analysis demonstrating classification accuracy for individual parameters.
| Parameter | % accuracy for safe | % accuracy for penetration/aspiration | % total accuracy |
|---|---|---|---|
| Impedance parameters | |||
| PNadImp | 87.7 ± 11.1 | 21.6 ± 13.2 | 67.9 ± 5.6 |
| PNadImp-PeakP | 79.1 ± 22.6 | 28.4 ± 13.7 | 63.8 ± 13.0 |
| Flow Interval | 85.5 ± 13.8 | 27.4 ± 18.9 | 68.0 ± 5.8 |
| Manometry parameters | |||
| Peak UES pressure | 90.4 ± 9.4 | 17.2 ± 12.9 | 68.4 ± 4.9 |
| UES RI | 82.9 ± 12.3 | 27.6 ± 13.8 | 66.3 ± 6.2 |
| UES IBP | 84.5 ± 20.6 | 27.0 ± 19.2 | 67.2 ± 12.5 |
| UES MRP | 95.3 ± 4.9 | 23.3 ± 15.7 | 73.6 ± 1.8 |
| UES DSR | 89.4 ± 15.6 | 26.5 ± 22.0 | 70.5 ± 7.6 |
| Peak pharyngeal pressure | 82.1 ± 20.8 | 25.3 ± 15.7 | 65.0 ± 11.5 |
| Slope | 87.0 ± 12.0 | 28.6 ± 17.8 | 69.5 ± 6.0 |
| Maximum VP pressure | 87.0 ± 15.0 | 38.6 ± 22.5 | 72.5 ± 8.0 |
| Maximum TB pressure | 90.2 ± 17.1 | 24.9 ± 11.8 | 70.6 ± 10.9 |
| Pre-opening UES pressure | 85.5 ± 17.6 | 19.6 ± 16.4 | 65.7 ± 8.0 |
| Post-closure UES pressure | 87.4 ± 11.9 | 18.2 ± 16.1 | 66.6 ± 5.8 |
| VP rise time | 89.1 ± 7.6 | 26.5 ± 13.0 | 70.3 ± 3.8 |
| TB Rise time | 84.3 ± 15.9 | 23.1 ± 13.5 | 65.9 ± 9.3 |
| Pre-opening UES rise time | 88.7 ± 6.3 | 23.9 ± 11.7 | 69.2 ± 4.1 |
| Post-closure UES rise time | 86.2 ± 6.6 | 33.1 ± 17.3 | 70.2 ± 5.4 |
| VP Fall time | 89.1 ± 19.7 | 20.0 ± 18.0 | 68.3 ± 9.2 |
| TB Fall time | 94.2 ± 4.7 | 17.2 ± 10.4 | 71.1 ± 2.1 |
| Pre-opening UES fall time | 88.4 ± 10.5 | 25.9 ± 13.9 | 69.6 ± 4.5 |
| Post-closure UES fall time | 89.5 ± 8.6 | 19.6 ± 10.4 | 68.5 ± 4.4 |
| VP duration | 91.7 ± 8.6 | 21.0 ± 11.0 | 70.4 ± 4.7 |
| TB duration | 92.2 ± 6.7 | 18.8 ± 9.5 | 70.1 ± 2.7 |
| UES duration | 96.5 ± 6.0 | 11.63 ± 9.6 | 71.0 ± 2.1 |
| Total swallow duration | 98.2 ± 1.9 | 7.1 ± 3.6 | 70.9 ± 1.4 |
| VP integral | 85.6 ± 7.3 | 36.3 ± 22.2 | 70.8 ± 3.4 |
| TB integral | 84.7 ± 13.8 | 22.0 ± 17.1 | 65.8 ± 5.8 |
| UES integral | 84.5 ± 22.4 | 19.6 ± 22.2 | 65.0 ± 14.3 |
| Minimum UES pressure | 81.8 ± 13.4 | 30.0 ± 16.5 | 66.2 ± 6.8 |
| Resting UES pressure | 90.5 ± 11.0 | 16.7 ± 10.6 | 68.3 ± 5.7 |
UES = upper esophageal sphincter; RI = rest interval; IBP = intrabolus pressure; DSR = deglutitive sphincter resistance; PNadImp = pressure at the impedance nadir; TNadImp-PeakP = difference in time between maximum pharyngeal pressure and PNadImp; VP = velopharynx; TB = tongue base.