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The frequency of torn zone based on Cooper classification in patients with ACL injury
| Zone of tear | Frequency | Percentage* |
|---|---|---|
| A1 | 21 | 4.5 |
| A2 | 23 | 4.9 |
| A3 | 24 | 5.1 |
| B1 | 37 | 7.9 |
| B2 | 19 | 4 |
| B3 | 42 | 8.9 |
| C1 | 39 | 8.3 |
| C2 | 6 | 1.3 |
| C3 | 29 | 6.2 |
| D1 | 40 | 8.5 |
| D2 | 10 | 2.1 |
| D3 | 18 | 3.8 |
| E1 | 28 | 5.9 |
| E2 | 26 | 5.5 |
| E3 | 33 | 7 |
| F1 | 29 | 6.2 |
| F2 | 19 | 4 |
| F3 | 27 | 5.7 |
* The percentages were calculated based on the total number of the torn menisci (470)
