| Index NNIS | Number of Interventions | Number of SSI | Rate per 100 Operated (%) |
| 0 | 73 | 8 | 10.9 |
| 1 | 105 | 27 | 25.7 |
| 2 et 3 | 31 | 13 | 41.9 |
| Total | 209 | 48 | 22.9 |