Table 2.
Nonlinear dynamic analysis: correlation dimension (D2), second-order entropy (K2), D2 and K2 standard deviation (SDD2 and SDK2), and Mann-Whitney rank sum test results
| Normal voice | Esophageal voice | Rank sum test results | |
|---|---|---|---|
| D2 | M = 2.349 SD = 0.343 |
M = 3.401 SD = 0.972 |
T = 65 p = 0.003* |
| K2 | M = 0.185 SD = 0.047 |
M = 0.472 SD = 0.178 |
T = 58 p < 0.001* |
| SDD2 | M = 0.0123* | M = 0.0299* | |
| SDK2 | M = 0.0001* | M = 0.002* |
M = mean, SD = standard deviation
*
Statistically significant at the p = 0.05 level