Table 3.
Performance of Changes in 4-Dimensional High-resolution Impedance Manometry Clearance Ratio and Intrabolus Pressure, Both Alone and in Combination, in Predicting Timed Barium Esophagram Outcome at 5 Minutes
| Predictor | Good TBE outcome | Poor TBE outcome | Totals |
|---|---|---|---|
| Change-IBP alone | |||
| > 8.9 mmHg | 14 (93%)a | 1 (7%) | 15 (100%) |
| < 8.9 mmHg | 11 (52%) | 10 (48%)b | 21 (100%) |
| Totals | 25 (69%) | 11 (31%) | 36 |
| Change-Clearance ratio alone | |||
| > 0.1 | 15 (83%)a | 3 (17%) | 18 (100%) |
| < 0.1 | 10 (56%) | 8 (44%)b | 18 (100%) |
| Totals | 25 (69%) | 11 (31%) | 36 |
| Combination of both | |||
| IBP reduction < 8.9 mmHg and clearance ratio increase > 0.1 | 8 (80%) | 2 (20%) | 10 (100%) |
| IBP reduction < 8.9 mmHg and clearance ratio increase < 0.1 | 3 (27%) | 8 (73%)b | 11 (100%) |
| Totals | 11 (52%) | 10 (48%) | 21 |
aNegative predictive values for good timed barium esophagram (TBE) outcome.
bPositive predictive values for poor TBE outcome.
IBP, intrabolus pressure.