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Eyebrow position changes and effect Sizes.
| Measurement | Preoperative Mean ± SD (mm) | Postoperative Mean ± SD (mm) | Change Percentage (%) | P-Value | Effect Size (Cohen’s d) |
|---|---|---|---|---|---|
| A-B (Medial Brow Position) | 30.0 ± 3.5 | 30.0 ± 3.5 | 0 | N/A | N/A |
| A-C (Lateral Brow Position) | 46.0 ± 4.6 | 71.0 ± 5.1 | 50 | 0.02 | 5.31 |
| B-C (Horizontal Alignment) | 50.0 ± 3.6 | 62.5 ± 4.5 | 25 | 0.04 | 3.09 |
| D-E (Apex of Brow) | 35.0 ± 5.6 | 50.75 ± 4.5 | 45 | 0.04 | 3.47 |
