Table 4. Correlation between the Acromial Morphology and RCT Size.
| Variable | Small-to-medium (n = 126) | Large (n = 63) | Massive (n = 50) | ||
|---|---|---|---|---|---|
| Lateral coverage | |||||
| LAA (°) | 76.4 ± 7.5 | 73.3 ± 5.7 | 73.8 ± 6.7 | ||
| p-value (vs. massive) | 0.070 | 0.918 | - | ||
| CSA (°) | 33.8 ± 3.1 | 34.5 ± 3.5 | 36.3 ± 3.1 | ||
| p-value (vs. massive) | < 0.001* | 0.012* | - | ||
| AP coverage | |||||
| AT (°) | 30.3 ± 4.7 | 28.1 ± 5.1 | 27.9 ± 6.5 | ||
| p-value (vs. massive) | 0.016* | 0.974 | - | ||
| APCI | 0.81 ± 0.09 | 0.85 ± 0.10 | 0.84 ± 0.10 | ||
| p-value (vs. massive) | 0.141 | 0.933 | - | ||
| AHI (mm) | 7.4 ± 1.3 | 5.8 ± 1.8 | 4.2 ± 1.7 | ||
| p-value (vs. massive) | < 0.001* | < 0.001* | - | ||
| Anterior glenoid coverage† (°) | –4.8 ± 7.3 | –1.3 ± 9.2 | –2.5 ± 9.3 | ||
| p-value (vs. massive) | 0.215 | 0.722 | - | ||
| Posterior glenoid coverage† (°) | 71.2 ± 7.7 | 70.6 ± 9.3 | 72.0 ± 8.8 | ||
| p-value (vs. massive) | 0.815 | 0.646 | |||
Values are presented as mean ± standard deviation.
RCT: rotator cuff tear, LAA: lateral acromial angle, CSA: critical should der angle, AP: anteroposterior, AT: acromial tilt, APCI: anteroposterior coverage index, AHI: acromiohumeral interval.
*Statistically significant. †According to the classification by Beeler et al.5)