Table 2.
Bivariate analysis: correlation with quantitative explanatory variables
| Parameter | Mean ± SD | Correlation coefficient (P value) | |||
|---|---|---|---|---|---|
| Glenoid defect (mm3) | Humeral head defect (mm3) | Number of total instability episodes (times) | Number of self-irreducible dislocations (times) | ||
| Age at CT scans (years) | 26.1 ± 10.4 |
0.074 (P = .419) |
0.215* (P = .018) |
0.224* (P = .014) |
0.297** (P = .001) |
| Age at initial trauma (years) | 19.7 ± 5.5 | 0.041 (P =.660) |
0.221* (P = .015) |
−0.097 (P = .290) |
0.026 (P = .781) |
| Duration of symptoms (years) | 6.4 ± 9.1 |
0.061 (P = .509) |
0.123 (P = .180) |
0.318*** (P < .001) |
0.322*** (P < .001) |
| Glenoid defect (mm3) | 292.8 ± 244.0 | - |
0.413*** (P < .001) |
0.354*** (P < .001) |
0.131 (P = .153) |
| Humeral head defect (mm3) | 435.1 ± 396.9 |
0.413*** (P < .001) |
- |
0.097 (P = .291) |
0.306** (P = .001) |
| Number of total instability episodes (times) | 19.1 ± 25.1 |
0.354*** (P < .001) |
0.097 (P = .291) |
- |
0.011 (P = .906) |
| Number of self-irreducible dislocations (times) | 2.3 ± 3.4 |
0.131 (P = .153) |
0.306** (P = .001) |
0.011 (P = .906) |
- |
Values are given as means and standard deviation. Statistical analyses of bone defect volumes were performed after correction of the values of bone defect volumes by the patient’s height
SD standard deviation
*P < .05; **P < .01; ***P < .001