Table 2.
Binary logistic regression analysis of relationship of the factors with ACL injury (n = 250)
| Variable | Regression coefficient | SD | P | OR | 95% CI |
|---|---|---|---|---|---|
| Age (years) | 0.730 | ||||
| 20–29 | −0.903 | 2.148 | 0.674 | 0.405 | 0.006–27.292 |
| 30–39 | −1.484 | 2.081 | 0.476 | 0.227 | 0.004–13.405 |
| 40–49 | −1.442 | 2.097 | 0.492 | 0.236 | 0.004–14.418 |
| 50–59 | −1.775 | 2.124 | 0.403 | 0.169 | 0.003–10.896 |
| 60–69 | −0.356 | 2.288 | 0.876 | 0.700 | 0.008–62.022 |
| Sex | 0.389 | 0.389 | 0.317 | 1.476 | 0.689–3.160 |
| Notch shape | 0.867 | ||||
| Notch shape M | −0.230 | 0.432 | 0.595 | 0.794 | 0.340–1.854 |
| Notch shape U | −0.110 | 0.745 | 0.883 | 0.896 | 0.208–3.857 |
| Notch width index | −35.42 | 7.890 | <0.001 | 4.141E-16 | 7.960E-23–2.154E-9 |
| Notch height index | 0.882 | 1.006 | 0.380 | 2.416 | 0.337–17.342 |
| α angle (°) | −0.038 | 0.032 | 0.231 | 0.963 | 0.905–1.024 |
| β angle (°) | 0.425 | 0.079 | <0.001 | 1.530 | 1.311–1.785 |
| Medial tibial slope | −0.026 | 0.095 | 0.787 | 0.975 | 0.809–1.175 |
| Lateral tibial slope | 0.352 | 0.086 | <0.001 | 1.422 | 1.201–1.683 |
OR: Odds ratio; CI: Confidence interval; α angle: The notch angle; β angle: The angle formed by the Blumensaat line and the long axis of the femur; n = 250, including 125 injured patients and 125 controls; ACL: Anterior cruciate ligament; SD: Standard deviation.