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The number and percentage of reoperations due to recurrent disc herniation in individual half-years in 2018–2020
| 1st (I)/2nd (II) half of the year | 2018 I | 2018 II | 2019 I | 2019 II | 2020 I | 2020 II | 2021 I | 2021 II | Total |
|---|---|---|---|---|---|---|---|---|---|
| Number of operations | 58 | 82 | 76 | 84 | 95 | 89 | 115 | 95 | 694 |
| Number of reoperations | 9 | 13 | 9 | 11 | 10 | 10 | 16 | 10 | 88 |
| % of reoperations | 15.5% | 15.8% | 11.8% | 13% | 10.5% | 11.2% | 13.9% | 10.5% | 12.6% |
