TABLE IV.
Statistical results.
| Linear regression analyses [y=ax+b, x=probe level (%DRμA)] | ||||||
|---|---|---|---|---|---|---|
| y | a | b | R2 | F | df | p |
| Clarion (monopolar) | ||||||
| Apical slope (dB/mm) | 0.00 | −1.28 | 0.00 | 0.01 | 15 | 0.92 |
| Basal slope (dB/mm) | 0.01 | 1.05 | 0.01 | 0.15 | 15 | 0.71 |
| Q1 dB bandwidth (mm) | 0.00 | 4.55 | 0.00 | 0.00 | 15 | 0.96 |
| Tip shift (mm) | −0.03 | 0.55 | 0.05 | 0.71 | 15 | 0.41 |
| Ap/Am (tip) | −0.05 | 0.62 | 0.08 | 1.22 | 15 | 0.29 |
| Nucleus (bipolar) | ||||||
| Apical slope (dB/mm) | 0.01 | −3.65 | 0.00 | 0.02 | 15 | 0.88 |
| Basal slope (dB/mm) | 0.03 | 3.41 | 0.01 | 0.20 | 15 | 0.66 |
| Q1 dB bandwidth (mm) | 0.03 | 1.98 | 0.04 | 0.56 | 15 | 0.47 |
| Tip shift (mm) | 0.05 | 0.76 | 0.09 | 1.49 | 15 | 0.24 |
| Ap/Am (tip) | 0.08 | −0.10 | 0.03 | 0.49 | 15 | 0.50 |
| T-tests [Clarion monopolar vs Nucleus bipolar]
| ||||||
| t | df | p | ||||
| Apical slope (dB/mm) | 3.68 | 10 | 0.004 | |||
| Basal slope (dB/mm) | −3.79 | 10 | 0.004 | |||
| Q1 dB bandwidth (mm) | 1.623 | 10 | 0.14 | |||
| Tip shift (mm) | −2.35 | 10 | 0.04 | |||
| Ap/Am (tip)a | T=30.0a | n=6,6a | 0.18 | |||
a
Mann-Whitney rank sum test used because equal variance test failed.