Table 2.
Model-based estimated difference between shear stiffness (μ) as calculated using local frequency estimation (LFE) and principal frequency analysis (PF) methods. At a pressure of 6 cm H20 and above, the difference becomes statistically significantly different.
| Ptp (cm H2O) | Est. diff. in μ [LFE-PF) (kPa) | Standard Error (kPa) | Degrees of Freedom | t-statistic | p |
|---|---|---|---|---|---|
| 3 | -0.65 | 0.33 | 18 | -1.99 | 0.0615 |
| 6 | -0.84 | 0.33 | 18 | -2.57 | 0.0194 |
| 9 | -1.49 | 0.32 | 18 | -4.67 | 0.0002 |
| 10 | -1.56 | 0.32 | 18 | -4.89 | 0.0001 |
| 12 | -1.95 | 0.32 | 18 | -6.11 | <.0001 |
| 15 | -2.11 | 0.32 | 18 | -6.60 | <.0001 |