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Results of the anesthetic block according to whether or not patient had a bone graft harvesting on the posterior iliac crest
| N =40 | Positive blocks | Negative blocks |
| Bone graft harvesting on the same pain side (15) | 5 (33.3%) | 10 (66.6%) |
| No iliac crest bone graft harvesting on the painful side (22) | 8 (36.4%) | 14 (63.6%) |
| Result unknown (3) | 1 | 2 |
Fischer’s test: 1.0
