Table 4 Comparison of objective voice acoustic parameters between the two groups (x ± s)
Index | Observation group(n = 53) | Control group (n = 53) | t value | P value | Mean Differences (Control - Observation Group) | Effect Sizes (Cohen’s d): | 95% Confidence Intervals (CI) for Mean Differences: |
|---|---|---|---|---|---|---|---|
Jitter (%) | 0.27 ± 0.11 | 0.44 ± 0.12 | 5.326 | < 0.01 | 0.17 | 1.48 (large effect) | [0.13, 0.21] |
Shimmer (%) | 1.31 ± 0.44 | 2.36 ± 0.54 | 3.547 | < 0.01 | 1.05 | 2.13 (very large effect) | [0.86, 1.24] |
MPT (s) | 19.36 ± 6.21 | 14.15 ± 4.23 | 6.387 | < 0.01 | -5.21 | -0.98 (moderate to large effect) | [-7.26, -3.16] |