The variation of intra-vertebral pressure (IV) with the injection time
| Time (min) | Group | IV pressure minimum (psi) | IV pressure maximum (psi) | IV pressure mean (psi) | Standard deviation, IV pressure mean (psi) | ANOVA results | |
|---|---|---|---|---|---|---|---|
| 3.5 | V-a | 0.11 | 0.65 | 0.52 | 0.33 | F = .44 | P = .65 |
| 6.5 | V-b | 0.26 | 0.57 | 0.43 | 0.22 | ||
| 9.5 | V-c | 0.28 | 0.53 | 0.39 | 0.20 | ||
| 3.5 | C-a | 0.16 | 0.77 | 0.50 | 0.19 | F = .02 | P = .89 |
| 6.5 | C-b | 0.28 | 0.82 | 0.52 | 0.22 |